A hand gesture is a movement of the hands that conveys a specific meaning or message. These gestures can vary widely across different cultures and contexts. For example, a thumbs-up gesture often signifies approval or agreement, while a wave can indicate greeting or farewell. Hand gestures are an important aspect of nonverbal communication, complementing spoken language. They can enhance understanding and express emotions, such as excitement or frustration. In some cases, certain gestures may even have unique meanings within specific groups, such as sign language used by the deaf community.