Definition of "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 hollow cast iron cylinder attached to the wheel that forms part of the brakes
noun: a musical percussion instrument; usually consists of a hollow cylinder with a membrane stretched 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 bulging cylindrical shape; hollow with flat ends
verb: study intensively, as before an exam
verb: play a percussion instrument
verb: make a rhythmic sound
"Rain drummed against the windshield."