An act or a remark that serves as a formality or as a sign of attitude.
A motion made with a pointing device, or on a touchscreen, that is recognised by the system as a command.
A motion of the limbs or body, especially one made to emphasize speech.
To make a gesture or gestures.
To accompany or illustrate with gesture or action.
To express something by a gesture or gestures.
An act of specifying.
An explicit set of requirements to be satisfied by a material, product, or service.