A drum is a musical instrument that you play by hitting it rhythmically with a stick or your hand. Most drums are round, with a thin material stretched tightly over the ends.
Some drums, like the West African djembe, are played with bare hands by a drummer who plays just one drum at a time. Others are found in a drum kit, often part of a rock band or a jazz ensemble, which might include a bass drum, a snare drum, cymbals, and a tom-tom — or even more. The word drum is also a verb, meaning "to play a drum," and can also mean "a cylinder-shaped container."