(intransitive) To move one’s hand back and forth (generally above the head) in greeting or departure.
(metonymy) To call attention to, or give a direction or command to, by a waving motion, as of the hand; to signify by waving; to beckon; to signal; to indicate.
A shape that alternatingly curves in opposite directions.
(figuratively) A sudden unusually large amount of something that is temporarily experienced.
A sideway movement of the hand(s).
A group activity in a crowd imitating a wave going through water, where people in successive parts of the crowd stand and stretch upward, then sit. Usually referred to as "the wave"
