Definition of hornet noun from the Oxford Advanced American Dictionary

 

hornet

 noun
noun
NAmE//ˈhɔrnət//
 
 
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  • a large wasp (= a black and yellow flying insect) that has a very powerful sting
  • Idioms
    a hornets' nest
     
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    a difficult situation in which a lot of people get very angry His letter to the editor stirred up a real hornets' nest.
    See the Oxford Advanced Learner's Dictionary entry: hornet