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    XR Glossary

    Immersive media moves fast, and the vocabulary moves with it. XRGuide points readers to the community-maintained XR Guild Library glossary as our recommended public reference for XR, VR, AR, MR, WebXR, spatial computing, and adjacent terms.

    XR Guild Library — Glossary

    A living, peer-reviewed glossary maintained by the XR Guild community. Definitions cover hardware, software, interaction paradigms, accessibility, ethics, and industry conventions used across immersive practice.

    Open the XR Guild glossary

    Terms at a glance

    49 terms · mirrored with attribution from the XR Guild Library. For the authoritative living version, follow the source link above.

    Core Technology Terms

    Extended Reality / XR

    Umbrella term for immersive and spatial technologies, including virtual reality, augmented reality, mixed reality, and related interactive systems. XR environments can blend digital content, physical environments, embodied interaction, and networked social experiences.

    Ethical relevanceXR can affect privacy, identity, embodiment, accessibility, safety, cognition, and social behavior.

    Related: Ethical Responsibility, Privacy & Policy, Security & Safety, Physiological and Psychological Effects of XR

    Virtual Reality / VR

    Immersive digital environments typically experienced through headsets, spatial audio, hand controllers, body tracking, or other interactive systems. VR may be used for entertainment, training, education, therapy, collaboration, social interaction, and simulation.

    Ethical relevanceVR can create powerful feelings of presence, raising questions about consent, psychological safety, harassment, simulation realism, accessibility, and data collection.

    Related: Physiological and Psychological Effects of XR, Security & Safety, Ethical Responsibility

    Augmented Reality / AR

    Overlays digital content onto a user's view of the physical world. AR can be experienced through phones, tablets, glasses, headsets, and other spatial devices.

    Ethical relevanceAR can affect public space, attention, surveillance, bystander privacy, advertising, safety, and the relationship between digital information and physical environments.

    Related: Privacy & Policy, Ethical Responsibility, Security & Safety

    Mixed Reality / MR

    Experiences where digital and physical elements interact in more integrated ways. MR systems may understand surfaces, objects, spatial context, hand gestures, room layouts, and real-time user behavior.

    Ethical relevanceMR systems may require detailed environmental mapping and behavioral data, raising questions about privacy, security, consent, and data ownership.

    Related: Privacy & Policy, Security & Safety, Current Peer-Reviewed Immersive Technologies

    Spatial Computing

    Computing systems that understand and interact with physical or virtual space, including XR, computer vision, sensors, mapping, gesture recognition, spatial audio, embodied interfaces, and AI-enhanced environments.

    Ethical relevanceSpatial computing expands computing into the body, home, workplace, classroom, and public life — creating new responsibilities for designers, developers, platforms, and institutions.

    Related: Ethical Responsibility, Privacy & Policy, Security & Safety

    Virtual Worlds

    Persistent or semi-persistent digital environments where people can gather, create, socialize, learn, work, play, and build culture through avatars and shared spaces. Accessed via VR, desktop, mobile, or web platforms.

    Ethical relevanceVirtual worlds raise questions about governance, moderation, identity, community safety, digital property, accessibility, cultural preservation, and user rights.

    Related: Ethical Responsibility, Security & Safety, Privacy & Policy

    Ethics and Governance Terms

    Ethical Responsibility

    The obligation of creators, developers, researchers, platforms, organizations, and communities to consider the social, psychological, cultural, and human consequences of immersive technologies.

    Ethical relevanceXR systems should be designed with care for user dignity, safety, consent, privacy, equity, accessibility, and long-term societal impact.

    Related: Ethical Responsibility

    Responsible Innovation

    Developing new technologies while actively considering risks, benefits, affected communities, unintended consequences, and public accountability.

    Ethical relevanceResponsible innovation helps prevent harm before products reach scale.

    Related: Ethical Responsibility, AI Ethics, Privacy & Policy

    Governance

    The rules, processes, policies, standards, and institutional structures that guide how technologies are developed, deployed, moderated, and regulated.

    Ethical relevanceGovernance determines who has power, who is protected, how disputes are resolved, and how accountability is enforced.

    Related: Ethical Responsibility, Privacy & Policy, Security & Safety

    Transparency

    Systems, platforms, and organizations clearly communicate how technologies work, what data is collected, how decisions are made, and what risks users may face.

    Ethical relevanceTransparency supports trust, accountability, informed consent, and responsible participation.

    Related: AI Ethics, Ethical Responsibility, Privacy & Policy

    Accountability

    Individuals, organizations, platforms, and systems can be held responsible for decisions, harms, errors, abuses, or failures.

    Ethical relevanceAccountability is essential when immersive technologies affect safety, privacy, identity, access, labor, education, health, and public life.

    Related: Ethical Responsibility, AI Ethics, Security & Safety

    Inclusion

    Designing systems, communities, and experiences that respect and support people across differences in ability, culture, age, language, gender, economic access, geography, and lived experience.

    Ethical relevanceInclusive design helps prevent immersive technologies from reinforcing exclusion, bias, discrimination, or unequal access.

    Related: Ethical Responsibility, AI Ethics, Privacy & Policy

    Accessibility

    Design of technologies, experiences, content, and interfaces so that people with disabilities and different needs can participate meaningfully.

    Ethical relevanceXR accessibility includes visual, auditory, mobility, cognitive, sensory, and economic considerations.

    Related: Ethical Responsibility, Physiological and Psychological Effects of XR

    AI Ethics Terms

    Artificial Intelligence / AI

    Computational systems that perform tasks commonly associated with human intelligence, such as perception, language processing, prediction, classification, generation, planning, and decision support.

    Ethical relevanceAI systems can influence access, identity, labor, creativity, social interaction, moderation, personalization, surveillance, and decision-making.

    Related: AI Ethics, Ethical Responsibility, Privacy & Policy

    Algorithmic Bias

    When an AI or computational system produces unfair, discriminatory, or systematically distorted outcomes because of flawed data, design, assumptions, training methods, or deployment contexts.

    Ethical relevanceBias can affect representation, access, safety, hiring, policing, education, healthcare, content moderation, avatars, and user experience.

    Related: AI Ethics, Ethical Responsibility

    AI Governance

    The policies, standards, practices, and oversight structures that guide the responsible development and deployment of AI systems.

    Ethical relevanceAI governance helps address risks related to bias, transparency, accountability, safety, privacy, labor, and human rights.

    Related: AI Ethics, Privacy & Policy, Ethical Responsibility

    Generative AI

    Systems that produce new content — text, images, audio, video, code, 3D assets, characters, environments, and interactive media.

    Ethical relevanceGenerative AI raises questions about authorship, consent, copyright, synthetic media, labor displacement, misinformation, bias, cultural appropriation, and creative integrity.

    Related: AI Ethics, Ethical Responsibility, Privacy & Policy

    Synthetic Media

    Images, videos, audio, avatars, voices, environments, or other content generated or manipulated by AI or computational tools.

    Ethical relevanceSynthetic media can enable creativity and accessibility, but can also enable impersonation, misinformation, non-consensual imagery, fraud, harassment, and identity abuse.

    Related: AI Ethics, Security & Safety, Privacy & Policy

    AI Transparency

    Making AI systems understandable to users, developers, regulators, and affected communities — including data sources, model behavior, limitations, risks, and decision processes.

    Ethical relevanceTransparency helps users understand when they are interacting with AI and how AI may affect them.

    Related: AI Ethics, Ethical Responsibility

    Privacy, Identity, and Data Terms

    Privacy

    The ability of individuals and communities to control access to information about themselves — personal, behavioral, biometric, location, social, and contextual data.

    Ethical relevanceXR can collect unusually intimate data, including movement, gaze, gestures, voice, environment scans, and social interactions.

    Related: Privacy & Policy, Security & Safety, Ethical Responsibility

    Behavioral Data

    Information about how people act, move, choose, speak, react, interact, and navigate within digital or physical environments.

    Ethical relevanceIn XR, behavioral data can reveal preferences, emotions, attention, habits, identity, disability, stress, relationships, and vulnerabilities.

    Related: Privacy & Policy, Security & Safety, Mind Control and Privacy at Work

    Biometric Data

    Data related to physical or behavioral characteristics that can identify or profile a person — face, voice, iris, gait, hand movement, body motion, heart rate, and other biological or behavioral signals.

    Ethical relevanceXR devices may collect biometric signals continuously, creating privacy and security risks if data is misused, leaked, inferred from, or shared without consent.

    Related: Privacy & Policy, Security & Safety, Neurotechnology

    Digital Identity

    How individuals are represented, recognized, authenticated, or socially understood in digital environments — usernames, avatars, profiles, credentials, reputations, virtual bodies, and platform histories.

    Ethical relevanceDigital identity affects autonomy, safety, reputation, self-expression, ownership, impersonation, and community trust.

    Related: Ethical Responsibility, Privacy & Policy, Security & Safety

    Avatar Identity

    The relationship between a user and their virtual body, character, or representation in immersive spaces.

    Ethical relevanceAvatars can support expression, embodiment, and belonging, but can also raise issues involving impersonation, harassment, stereotyping, realism, identity misuse, and emotional attachment.

    Related: Ethical Responsibility, Mind Control and Privacy at Work, Privacy & Policy

    Data Minimization

    The principle that systems should only collect the data necessary for a clear and legitimate purpose.

    Ethical relevanceBecause XR can collect highly sensitive information, minimizing data collection helps reduce privacy, security, and surveillance risks.

    Related: Privacy & Policy, Security & Safety

    Surveillance

    The monitoring, recording, tracking, or analysis of people, behavior, environments, or social interactions.

    Ethical relevanceXR surveillance may involve users, bystanders, workplaces, classrooms, public spaces, or private homes.

    Related: Privacy & Policy, Mind Control and Privacy at Work, Security & Safety

    Safety and Security Terms

    Safety by Design

    Building protections into products, systems, communities, and experiences from the beginning rather than adding them after harms occur.

    Ethical relevanceXR safety may include moderation tools, reporting systems, personal boundaries, age protections, comfort settings, accessibility support, and abuse prevention.

    Related: Security & Safety, Ethical Responsibility

    Security

    Protection of systems, devices, data, identities, networks, and users from unauthorized access, abuse, manipulation, theft, or harm.

    Ethical relevanceXR security is especially important because immersive systems may involve identity, biometrics, payments, social interaction, workplace data, and environmental mapping.

    Related: Security & Safety, Privacy & Policy

    Harassment in XR

    Unwanted, hostile, threatening, discriminatory, sexual, or abusive behavior in immersive environments.

    Ethical relevanceBecause XR can create embodied presence, harassment can feel more physically and psychologically intense than harassment in traditional media.

    Related: Security & Safety, Ethical Responsibility, Physiological and Psychological Effects of XR

    Moderation

    The practices, tools, policies, and human or automated systems used to manage behavior, content, conflict, safety, and community standards.

    Ethical relevanceModeration affects speech, safety, fairness, inclusion, governance, appeal rights, and community trust.

    Related: Security & Safety, Ethical Responsibility, AI Ethics

    Age-Appropriate Design

    Creating digital services that protect and support children and young people according to their developmental needs, rights, safety, and privacy.

    Ethical relevanceXR experiences for children require special care around data collection, advertising, social interaction, safety, embodiment, and psychological effects.

    Related: Security & Safety, Privacy & Policy, Ethical Responsibility

    Risk Assessment

    Identifying possible harms, evaluating their likelihood and severity, and designing safeguards to reduce them.

    Ethical relevanceXR risk assessments should consider physical safety, privacy, psychological effects, identity, harassment, accessibility, manipulation, and vulnerable users.

    Related: Security & Safety, Ethical Responsibility, Privacy & Policy

    Neurotechnology and Cognitive Rights Terms

    Neurotechnology

    Technologies that monitor, measure, stimulate, interpret, or interact with the nervous system or brain-related signals.

    Ethical relevanceNeurotechnology can create benefits in accessibility, health, communication, and research, but also raises deep concerns about mental privacy, agency, consent, and misuse.

    Related: Neurotechnology, Brain Tech, and Ethical Challenges

    Brain-Computer Interface / BCI

    A system that enables communication between the brain or nervous system and a computer or device.

    Ethical relevanceBCIs may affect privacy, autonomy, identity, health, accessibility, labor, and human agency.

    Related: Neurotechnology, Brain Tech, and Ethical Challenges, Mind Control and Privacy at Work

    Neural Data

    Information collected from the brain or nervous system, including signals that may reveal cognitive, emotional, sensory, or behavioral states.

    Ethical relevanceNeural data can be highly sensitive because it may relate to mental states, health, emotion, attention, intention, or identity.

    Related: Neurotechnology, Brain Tech, and Ethical Challenges, Privacy & Policy

    Cognitive Liberty

    The right to mental self-determination, including freedom of thought, mental privacy, and protection from unwanted manipulation or coercive influence.

    Ethical relevanceXR, AI, neurotechnology, and persuasive systems may affect attention, belief, behavior, autonomy, and decision-making.

    Related: Mind Control and Privacy at Work, Neurotechnology, Ethical Responsibility

    Mental Privacy

    Protection from unauthorized access, inference, manipulation, or exposure of a person's thoughts, emotions, intentions, or cognitive states.

    Ethical relevanceAs immersive and neural technologies become more sophisticated, mental privacy becomes central to human dignity and autonomy.

    Related: Mind Control and Privacy at Work, Neurotechnology, Privacy & Policy

    Persuasive Design

    Design strategies that influence user behavior, choices, attention, habits, or beliefs.

    Ethical relevancePersuasive design can support beneficial outcomes, but it can also become manipulative when users are not aware of how they are being influenced.

    Related: Mind Control and Privacy at Work, AI Ethics, Ethical Responsibility

    Behavioral Nudging

    Subtle design choices that steer users toward certain actions or decisions.

    Ethical relevanceIn immersive environments, nudging can be powerful because it may combine embodiment, spatial cues, AI personalization, social pressure, and sensory design.

    Related: Mind Control and Privacy at Work, AI Ethics, Ethical Responsibility

    Physiological and Psychological Terms

    Presence

    The feeling of "being there" inside a virtual, augmented, or mixed reality experience.

    Ethical relevancePresence can deepen learning and empathy, but it can also intensify fear, harassment, manipulation, trauma, discomfort, and emotional impact.

    Related: Physiological and Psychological Effects of XR, Ethical Responsibility

    Embodiment

    The feeling that a virtual body, avatar, or digital representation is connected to one's sense of self or physical experience.

    Ethical relevanceEmbodiment can affect identity, empathy, confidence, bias, body image, emotional response, and social interaction.

    Related: Physiological and Psychological Effects of XR, Ethical Responsibility

    Simulator Sickness

    Nausea, dizziness, disorientation, eye strain, headaches, or discomfort that may occur during or after immersive experiences.

    Ethical relevanceXR creators should design experiences that reduce discomfort, support user control, and provide clear safety guidance.

    Related: Physiological and Psychological Effects of XR, Security & Safety

    Cybersickness

    A form of motion-related discomfort that can occur in virtual environments, often caused by mismatch between visual motion and the body's physical sense of movement.

    Ethical relevanceReducing cybersickness is part of responsible, accessible, and safe XR design.

    Related: Physiological and Psychological Effects of XR, Security & Safety

    Emotional Harm

    Distress, anxiety, fear, humiliation, trauma, or other negative psychological impacts caused or intensified by an experience.

    Ethical relevanceXR can make emotional experiences feel more immediate and embodied, requiring careful attention to content warnings, consent, moderation, and user controls.

    Related: Physiological and Psychological Effects of XR, Security & Safety, Ethical Responsibility

    Policy and Research Terms

    Peer-Reviewed Research

    Scholarship that has been evaluated by experts before publication.

    Ethical relevancePeer-reviewed work can help ground XR ethics in evidence, rather than speculation, marketing claims, or hype.

    Related: Current Peer-Reviewed Immersive Technologies

    Policy

    Formal rules, guidelines, regulations, standards, or organizational practices that shape how technologies are developed, used, governed, and evaluated.

    Ethical relevancePolicy can protect users, define responsibilities, guide institutions, and create accountability across the XR ecosystem.

    Related: Privacy & Policy, Ethical Responsibility, Security & Safety

    Standards

    Agreed-upon technical, ethical, safety, accessibility, or governance practices that help systems work responsibly and consistently.

    Ethical relevanceStandards can improve interoperability, safety, accessibility, privacy, and public trust.

    Related: Ethical Responsibility, Security & Safety, Privacy & Policy

    Human Subjects Protection

    Ethical safeguards for people participating in research, testing, or studies.

    Ethical relevanceXR research can involve sensitive data, emotional response, embodiment, social interaction, biometric signals, and psychological effects — requiring careful protections.

    Related: Current Peer-Reviewed Immersive Technologies, Security & Safety, Privacy & Policy

    Definitions above are lightly paraphrased educational excerpts of the XR Guild Library glossary and used with attribution. The XR Guild Library is the living, authoritative source — see the full glossary for updates, additional terms, and contribution guidelines.

    XRGuide is editorially independent from the XR Guild. We reference the Guild's public library and 12 Principles as one input to our curation and educational content. See About and How we curate for more on our editorial approach.

    Spotted a term missing or unclear? Suggest additions to the XR Guild Library directly, or contact us and we'll flag it.