sign language
US /ˈsaɪn ˌlæŋ.ɡwɪdʒ/
UK /ˈsaɪn ˌlæŋ.ɡwɪdʒ/
1.
a system of communication using visual gestures and signs, used by deaf people.
:
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She learned sign language to communicate with her deaf brother.
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There are many different types of sign language around the world.