Definitions
1.nounA percussive musical instrument spanned with a thin covering on at least one end for striking, forming an acoustic chamber, affecting what materials are used to make it; a membranophone.
2.nounAny similar hollow, cylindrical object."Replace the drum unit of your printer."
3.nounA barrel or large cylindrical container for liquid transport and storage."The restaurant ordered ketchup in 50-gallon drums."
4.nounThe encircling wall that supports a dome or cupola.
5.nounAny of the cylindrical blocks that make up the shaft of a pillar.
6.nounA drumfish (family Sciaenidae).
7.nounA tip; a piece of information.