sign language(redirected from Portuguese Sign Language)
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sign languageA formal language of nonverbal communication based on hand shapes and gestures, facial expressions and movements.
sign languageAudiology A formal language of nonverbal communication based on hand shapes, facial expressions, and movements. See Americans with Disabilities Act.
sign lan·guage(sīn lang'gwăj)
A system of manual communication used by the deaf. True sign languages such as American Sign Language (ASL) have a complete representation of morphology, semantics, and syntax.