n a musical percussion instrument; usually consists of a hollow cylinder with a membrane stretched across each end
n the sound of a drum
n a bulging cylindrical shape; hollow with flat ends
n a cylindrical metal container used for shipping or storage of liquids
n a hollow cast-iron cylinder attached to the wheel that forms part of the brakes
n small to medium-sized bottom-dwelling food and game fishes of shallow coastal and fresh waters that make a drumming noise
v make a rhythmic sound
v play a percussion instrument
v study intensively, as before an exam
n. 鼓；鼓声（drum的复数）