ATLAS OF LANGUAGE

AT-DEP4-0007 · ATLAS 260

Sign language

A natural language in the visual-spatial modality that systematically organises hands, body, gaze and facial expression.

Part of the subject path Philosophy of Language, Thought and Knowledge

Why is this entry in the Atlas?

G · Foundational concept R2 · Necessary foundation

Sign language is indispensable to a modality-inclusive account of language because full linguistic organisation is realised through visual and spatial resources. Fingerspelling or individual gestures cannot substitute for the independent grammar of a natural sign language.

Colours and admission grounds

The rectangular label identifies the entry function: F – linguistic figure or procedure; A – analytical concept; G – foundational concept; E – selected concrete case. The rounded badge indicates the admission ground: R1 – distinctive contribution; R2 – necessary foundation; R3 – justified illustrative case. This editorial rationale explains the current selection rather than claiming an undocumented original selection history.

Explanation

Sign languages are natural languages that systematically organise hands, face, gaze, head, and body in the visual-spatial modality. They possess independent lexicons and grammars; spatial arrangement, movement, and non-manual features may simultaneously carry morphological, syntactic, or discourse functions. A sign language is neither universal nor merely a gestural translation of a surrounding spoken language: German Sign Language, British Sign Language, and others have distinct histories and structures. Signed codes based on spoken languages and supportive gestures must be separated from them. The concept expands the understanding of language by revealing which properties are linguistic across modalities and which possibilities a visual-spatial modality offers for iconicity, simultaneity, and reference.

Movement of thought

1. Communication begins within a shared visual space where hands, face, gaze, and body are available as differentiated linguistic articulators. 2. Conventional forms combine handshape, location, movement, orientation, and non-manual features into lexical and grammatical units. 3. Spatial loci and simultaneous articulation organise reference, role, event structure, and discourse in modality-specific ways. 4. A counter-test examines community, conventionalisation, and grammar and separates sign language from spontaneous gesture, mime, fingerspelling, and manually coded speech. 5. Language returns as a cross-modal capacity: structured shared sign practice, rather than sound, provides its sustaining basis.

Scientific use case

Sign-language linguistics uses video and motion annotation to study phonology, morphosyntax, role shift, and discourse reference. Cross-linguistic comparison separates modality effects from universal or genealogically shared properties.

Example

Two Deaf signers establish a locus to their right for an absent colleague and later retrieve it through gaze, body orientation, and the directed movement of a verb.

Counterexample

A silent point toward a door is an intelligible gesture. Without integration into the lexicon and grammar of a signing community, that act is not yet sign language.

Distinction

Distinguish sign language from gesture, mime, fingerspelling, sign-supported speech, manually coded spoken language, sign systems in a general semiotic sense, and the myth of one universal sign language.

Effect on thought and perception

Sign language enables complete linguistic engagement with the world in visual space and reveals simultaneity, body orientation, and spatial reference as grammatical resources.

Resonance

Meaning moves visibly among bodies and locations; a point established in space remains addressable and carries memory, relation, and action forward.

Cite this entry

Reich, Michael (Hrsg./ed.): „Sign language“. Atlas der Sprache, AT-DEP4-0007. ATLAS 260, data model 1.6.0. https://atlasoflanguage.com/concept/AT-DEP4-0007

https://atlasoflanguage.com/concept/AT-DEP4-0007

The address remains stable; editorial content may evolve. Editorial reading state: 2026-10-15. Include your access date for precise references.

Historical background

Sapir’s auditory model treats the gesture languages he mentions as transfers of speech. This is a historical limitation, not our definition. Aronoff and his coauthors cite Stokoe 1960 when discussing the formal organisation of established signed languages; Stokoe’s original monograph was not directly read here. Direct empirical evidence comes from Aronoff, Meir, Padden and Sandler 2008: their analysis of Al-Sayyid Bedouin Sign Language addresses conventional signs, syntax and prosody, rather than a substitute code for spoken words. Its limited sample and the language’s developmental history prevent generalising every finding to all signed languages. The Atlas separates sensory channel from linguistic organisation. ASL, DGS and ABSL are distinct languages, not labels for one universal system.

How conceptual history changes the analysis

Examine whether the visual system is analysed on its own terms or reduced to a spoken-language code. This historical assumption cannot define sign languages today.

References for the historical section

Historical source evidence and Atlas applications remain separate; this import does not assert new first attestations or a fresh exhaustive source verification.