Definition of groan noun from the Oxford Advanced Learner's Dictionary

 

groan

 noun
noun
BrE BrE//ɡrəʊn//
 
; NAmE NAmE//ɡroʊn//
 
 
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a long deep sound made when somebody/something groans synonym moan She let out a groan of dismay. He fell to the floor with a groan. The house was filled with the cello's dismal squeaks and groans. Word Origin Old English grānian, of Germanic origin; related to German greinen ‘grizzle, whine’, grinsen ‘grin’, also probably to grin.Extra examples He stood up slowly with a groan of pain. The doctors all ignored her moans and groans. a groan of annoyance
See the Oxford Advanced American Dictionary entry: groan