Definition of oompah noun from the Oxford Advanced American Dictionary

 

oompah

 noun
noun
NAmE//ˈʊmpɑ//
 
, NAmE//ˈumpɑ//
 
(also ˈoompah-ˌpah)(informal)
 
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used to refer to the sound produced by a group of brass instruments an oompah band
See the Oxford Advanced Learner's Dictionary entry: oompah