the striking of one body against another with some sharpness; impact; blow.

Medicine/Medical . the striking or tapping of the surface of a part of the body for diagnostic or therapeutic purposes.

the striking of a musical instrument to produce tones.

Music .

the section of an orchestra or band comprising the percussion instruments.

the percussion instruments themselves.

a sharp blow for detonating a percussion cap or the fuze of an artillery shell.

the striking of sound on the ear.

the act of percussing.

noun

bump , concussion , crash , impact , jar , jolt , shock , smash , blow , collision , sound