Definition of kettledrum noun from the Oxford Advanced American Dictionary

 

kettledrum

 noun
noun
NAmE//ˈkɛt̮lˌdrʌm//
 
 
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a large metal drum with a round bottom and a thin plastic top that can be made looser or tighter to produce different musical notes. A set of kettledrums is usually calledtimpani.
See the Oxford Advanced Learner's Dictionary entry: kettledrum