(v): put into a certain place or abstract location
(v): cause to strike the air in flight
(v): move with a thrashing motion
(v): clap one's hands or shout after performances to indicate approval
(v): show, express or direct through movement
(v): clap one's hands together
(v): show, express or direct through movement
(v): strike the air in flight
(v): move with a flapping motion
(v): strike with the flat of the hand; usually in a friendly way, as in encouragement or greeting
(v): deal a blow to, either with the hand or with an instrument
(v): strike together so as to produce a sharp percussive noise
(v): cause to move by striking
(n): a sudden very loud noise
(n): sound of any kind (especially unintelligible or dissonant sound)
(n): a common venereal disease caused by the bacterium Neisseria gonorrhoeae; symptoms are painful urination and pain around the urethra
(n): a communicable infection transmitted by sexual intercourse or genital contact
(n): a sharp abrupt noise as if two objects hit together; may be repeated
(n): sound of any kind (especially unintelligible or dissonant sound)
The "common venereal disease" definition has led to the idiom "a case of the clap". This has in turn led to the humorous usage referring to unbidden or "inappropriate" applause in the middle of a live classical performance, e.g. "The audience had a case of the clap tonight."
(Disclaimer: I am not against applause between movements at concerts, but there are certainly times when it's ill-judged.)
Their first favour was to clap me up in a cell, where they left me on the straw like a criminal, whose only earthly portion was to con over his dying speech in solitude.
- Lesage, The Adventures of Gil Blas of Santillane, tr. Smollett, bk 9 ch. 4
Whatever WeirdNet may say, I'm going with the 'hit palms together noisily' meaning.