Definition of 'drum'

Noun

1. a musical percussion instrument; usually consists of a hollow cylinder with a membrane stretched across each end
      Synonyms: membranophone tympan
2. the sound of a drum; "he could hear the drums before he heard the fifes"
3. a bulging cylindrical shape; hollow with flat ends
      Synonyms: barrel
4. a cylindrical metal container used for shipping or storage of liquids
      Synonyms: metal drum
5. a hollow cast-iron cylinder attached to the wheel that forms part of the brakes
      Synonyms: brake drum
6. small to medium-sized bottom-dwelling food and game fishes of shallow coastal and fresh waters that make a drumming noise
      Synonyms: drumfish

Verb

1. make a rhythmic sound; "Rain drummed against the windshield"; "The drums beat all night"
      Synonyms: beat thrum
2. play a percussion instrument
3. study intensively, as before an exam; "I had to bone up on my Latin verbs before the final exam"
      Synonyms: cram grind away bone up swot get up mug up swot up bone

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