Definition of cockroach noun from the Oxford Advanced American Dictionary

 

cockroach

 noun
noun
NAmE//ˈkɑkroʊtʃ//
 
(informal roach)
 
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a large brown insect with wings, that lives in houses, especially where there is dirt The kitchens were discovered to be infested with cockroaches.
See the Oxford Advanced Learner's Dictionary entry: cockroach