* Noun: This is the most common usage. It refers to a movement of the body, especially the hands or head, to express an idea or emotion.
* Example: "He made a rude gesture with his middle finger."
* Verb: This usage means to make a gesture.
* Example: "She gestured to the empty chair."
* Adjective: This is less common but can be used to describe something as being done with a gesture or involving gestures.
* Example: "The gesture of giving a flower is a romantic one."
So, the part of speech for "gesture" depends on the specific context of the sentence.