Drum is a musical instrument that produces sound by the vibration of a stretched membrane (drumhead).
The term "drum" can also refer to:
1. A cylindrical container for liquids (oil drum)
2. The act of playing drums (to drum)
3. A repetitive sound (drumming of rain)
4. In anatomy, the eardrum (tympanic membrane)
5. In engineering, a rotating part (brake drum)