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

 

molehill

 noun
noun
BrE BrE//ˈməʊlhɪl//
 
; NAmE NAmE//ˈmoʊlhɪl//
 
 
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  • a small pile of earth that a mole leaves on the surface of the ground when it digs underground
  • Idioms
    make a mountain out of a molehill
     
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    (disapproving) to make an unimportant matter seem important
    See the Oxford Advanced American Dictionary entry: molehill