drum in WordNet English dictionary

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

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