1. v. (intransitive) To move back and forth repeatedly.
The flag waved in the gentle breeze.
2. v. (intransitive) To move one’s hand back and forth (generally above the head) in greeting or departure.
3. v. (transitive, metonymic) 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.
I waved goodbye from across the room.
4. v. (intransitive) To have an undulating or wavy form.
5. v. To raise into inequalities of surface; to give an undulating form or surface to.
6. v. To produce waves to the hair.
7. v. (intransitive, baseball) To swing and miss at a pitch.
Jones waves at strike one.
8. v. To cause to move back and forth repeatedly.
The starter waved the flag to begin the race.
9. v. (transitive, metonymic) To signal (someone or something) with a waving movement.
10. v. (intransitive, obsolete) To fluctuate; to waver; to be in an unsettled state.
11. v. (intransitive, ergative) To move like a wave, or by floating; to waft.
12. n. A moving disturbance in the level of a body of liquid; an undulation.
The wave traveled from the center of the lake before breaking on the shore.
13. n. (physics) A moving disturbance in the energy level of a field.
Gravity waves, while predicted by theory for decades, have been notoriously difficult to detect.
14. n. A shape that alternatingly curves in opposite directions.
Her hair had a nice wave to it.
sine wave
15. n. (figuratively) A sudden unusually large amount of something that is temporarily experienced.
A wave of shoppers stampeded through the door when the store opened for its Christmas discount special.
A wave of retirees began moving to the coastal area.
A wave of emotion overcame her when she thought about her son who was killed in battle.
16. n. A sideway movement of the hand(s).
He dismissed her with a wave of the hand.
17. n. (usually "the wave") 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.