1. A method of distinguishing meaningful gestures from proximate non-meaningful gestures in a three-dimensional (3D) sensory space, the method including: distinguishing at least one selected from wrist flexing and finger flexing from an overall trajectory of an arm making a gesture; wherein at least some of the wrist flexing and finger flexing occurs while the arm is in motion, including: detecting positions of the arm and attached wrist and fingers in a three dimensional (3D) sensory space using an electronic sensor; calculating from the detected positions a spatial trajectory of a waving gesture executed by the arm; calculating from the detected positions a spatial trajectory of a flexing gesture made by the wrist and/or fingers; and determining whether the waving gesture or the flexing gesture is a dominant gesture based on magnitudes of the respective spatial trajectories; and triggering a response to the dominant gesture without triggering a response to a non-dominant gesture.