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

 

flea

 noun
noun
BrE BrE//fliː//
 
; NAmE NAmE//fliː//
 
Invertebrates
 
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  • a very small jumping insect without wings, that bites animals and humans and sucks their blood The dog has fleas. See related entries: Invertebrates
  • Word Origin Old English flēa, flēah, of Germanic origin; related to Dutch vlo and German Floh.Idioms
    with a flea in your ear
     
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    if somebody sends a person away with a flea in their ear, they tell them angrily to go away
    See the Oxford Advanced American Dictionary entry: flea