non-verbal

Short definition from Wiktionary

Adjective

1. 1
   In a form other than written or spoken words, such as gestures, facial expressions or body language.
2. 2
   Of or relating to a word that belongs to any part of speech other than that of verbs.
3. 3
   Unable to speak.

Noun

1. 1
   A sound, gesture, etc. that is not a word.