Meaning of sign language

sign' lan"guage

Pronunciation: [key]
  1. Also calledany of several visual-gestural systems of communication, esp. employing manual gestures, as used among deaf people.
  2. any means of communication, as between speakers of different languages, using gestures.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.