Which term describes a movement of the hand or arm that communicates meaning?

The term that describes a movement of the hand or arm that communicates meaning is "gesture." In the context of drama and performance, gestures are specific movements that convey emotions, intentions, or meanings without the use of words. They enhance communication and help to express the character’s feelings and interactions with others on stage.

In contrast, a pose typically refers to a fixed position of the body, often for dramatic effect or to convey a specific character trait, but it does not inherently involve movement or communication. An expression usually relates to the facial movements and emotions displayed by a performer rather than the movement of the hand or arm. Movement, while it encompasses all types of physical action, is a broader term that does not specifically denote the communicative aspect of hand or arm motions. Therefore, gesture is the most precise term representing this concept in drama.