• To strike; to slap; to strike, or strike together, with a quick motion, so, as to make a sharp noise; as, to clap one's hands; a clapping of wings. • To thrust, drive, put, or close, in a hasty or abrupt manner; -- often followed by to, into, on, or upon. • To manifest approbation of, by striking the hands together; to applaud; as, to clap a performance. • To express contempt or derision. • To knock, as at a door. • To strike the hands together in applause. • To come together suddenly with noise. • To enter with alacrity and briskness; -- with to or into. • To talk noisily; to chatter loudly. • A loud noise made by sudden collision; a bang. • A burst of sound; a sudden explosion. • A single, sudden act or motion; a stroke; a blow. • A striking of hands to express approbation. • Noisy talk; chatter. • The nether part of the beak of a hawk. • Gonorrhea.