noun, plural drums, (especially collectively for 11) drum, verb, drummed, drum⋅ming.| 1. | a musical percussion instrument consisting of a hollow, usually cylindrical, body covered at one or both ends with a tightly stretched membrane, or head, which is struck with the hand, a stick, or a pair of sticks, and typically produces a booming, tapping, or hollow sound. |
| 2. | any hollow tree or similar object or device used in this way. |
| 3. | the sound produced by such an instrument, object, or device. |
| 4. | any rumbling or deep booming sound. |
| 5. | a natural organ by which an animal produces a loud or bass sound. |
| 6. | eardrum. |
| 7. | any cylindrical object with flat ends. |
| 8. | a cylindrical part of a machine. |
| 9. | a cylindrical box or receptacle, esp. a large, metal one for storing or transporting liquids. |
| 10. | Also called tambour. Architecture.
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| 11. | any of several marine and freshwater fishes of the family Sciaenidae that produce a drumming sound. |
| 12. | Also called drum memory. Computers. magnetic drum. |
| 13. | Archaic. an assembly of fashionable people at a private house in the evening. |
| 14. | a person who plays the drum. |
| 15. | Australian Informal. reliable, confidential, or profitable information: to give someone the drum. |
| 16. | to beat or play a drum. |
| 17. | to beat on anything rhythmically, esp. to tap one's fingers rhythmically on a hard surface. |
| 18. | to make a sound like that of a drum; resound. |
| 19. | (of ruffed grouse and other birds) to produce a sound resembling drumming. |
| 20. | to beat (a drum) rhythmically; perform by beating a drum: to drum a rhythm for dancers. |
| 21. | to call or summon by, or as if by, beating a drum. |
| 22. | to drive or force by persistent repetition: to drum an idea into someone. |
| 23. | to fill a drum with; store in a drum: to drum contaminated water and dispose of it. |
| 24. | drum out,
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| 25. | drum up,
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| 26. | beat the drum, to promote, publicize, or advertise: The boss is out beating the drum for a new product. |

| a cylinder coated with magnetic material, on which data and programs can be stored. |
drum (drŭm)
n.
See eardrum.