A 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
Any similar hollow, cylindrical object.
Replace the drum unit of your printer.
3
A barrel or large cylindrical container for liquid transport and storage.
The restaurant ordered ketchup in 50-gallon drums.
4
The encircling wall that supports a dome or cupola.