A gesture is a form of non-verbal communication in which visible bodily actions communicate particular messages such as the open gesture of Desmond Tutu . Gestures may be made with almost any movable part of the body. Our focus will be speech related gestures, primarily of the hand and arm. Gestures can be categorized as either speech independent or speech related.
Source: Boundless. “Movement and Gesture.” Boundless Communications. Boundless, 03 Jul. 2014. Retrieved 21 Jan. 2015 from https://www.boundless.com/communications/textbooks/boundless-communications-textbook/delivering-the-speech-12/components-of-effective-visual-delivery-65/movement-and-gesture-261-10649/