gesture
noun
a movement or position of the hand, arm, body, head, or face that is expressive of an idea, opinion, emotion, etc..
Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
As Bob entered the office Jenkins sat tipped back in a swivel chair, his left arm resting on his desk, the right free as though it had been gesturing.
From The Desert Fiddler by William H. (William Henry) Hamby