Wave to is a common gesture used to GREET someone. It is a friendly and nonverbal way of saying hello. Wave to is a simple action that involves raising your hand and moving it up and down in a waving motion. This gesture is often used when greeting someone from a distance, such as when saying goodbye or hello to a friend. It is also used to show appreciation or acknowledgement of someone's presence. Wave to is a universal gesture that is understood by people of all cultures and backgrounds.