gesture

Sign can mean:

• the movement of a part of the body , especially the hand , intended to express something
  • as part of non-verbal communication
  • as part of body language
  • in the sense of characters , for example the finger alphabet or the display of digits
  • as an individual component of sign language or spoken language-accompanying signs ( LBG ) or sign-supported communication ( GuK )
• a synonym for gesture or for a pretended behavior