What is the meaning of drum?

noun

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

verb

• Make a rhythmic sound.
  • usage: "Rain drummed against the windshield"; "The drums beat all night"
  • synonyms: beat, thrum
• Play a percussion instrument.
• Study intensively, as before an exam.
  • usage: "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