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English definition of “sign language”

sign language

noun [U or C]    
(also sign [U]) a system of hand and body movements representing words, used by and to people who cannot hear or talkHandicap and the disabledLanguage names the movements that people sometimes make when talking to someone whose language they do not speakHandicap and the disabledLanguage names
(Definition of sign language noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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