Non-verbal communication
Non-verbal communication was the act of communicating using one's actions rather than voice (verbal communication).

In 2267, Zefram Cochrane explained his communication with the Companion as being on a non-verbal level, though that didn't stop him from saying what he meant to. ()

In 2377, after being attacked despite assurances that  had no ill intentions, Kathryn Janeway suggested using non-verbal communication with the Hirogen instead, by employing evasive pattern beta 6 and disabling their weapons. The tactic worked. ()

Forms of non-verbal communication 
 Audible communication 
 Door chime
 Knocking
 Morse code
 Body language
 Eye contact 
 Facial expression
 Tova'dok
 Gesture
 Bowing
 Gestural idiom
 Hand signal
 The finger
 Sign language
 American Sign Language
 M-9
 Terran salute
 V sign
 Vulcan salute
 Head shake
 Nod
 Telepathy
 Touch
 Handshake
 Hug
 Kiss
 
 Pat on the back
 Pat on the head
 Vulcan finger-touching
 Writing

External link 
 
Communication