Quick definitions from WordNet (drum)

▸ noun:  small to medium-sized bottom-dwelling food and game fishes of shallow coastal and fresh waters that make a drumming noise
▸ noun:  a musical percussion instrument; usually consists of a hollow cylinder with a membrane stretch across each end
▸ noun:  a cylindrical metal container used for shipping or storage of liquids
▸ noun:  the sound of a drum ("He could hear the drums before he heard the fifes")
▸ noun:  a hollow cast-iron cylinder attached to the wheel that forms part of the brakes
▸ noun:  a bulging cylindrical shape; hollow with flat ends
▸ verb:  make a rhythmic sound ("Rain drummed against the windshield")
▸ verb:  play a percussion instrument
▸ verb:  study intensively, as before an exam
▸ name:  A surname (rare: 1 in 50000 families; popularity rank in the U.S.: #6923)

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▸ Also see drum