English

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

 

haystack

 noun
noun
BrE BrE//ˈheɪstæk//
 
; NAmE NAmE//ˈheɪstæk//
 
(less frequent hayrick
BrE BrE//ˈheɪrɪk//
 
; NAmE NAmE//ˈheɪrɪk//
 
)
 
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  • a large pile of hay, used as a way of storing it until it is needed
  • Idioms a thing that is almost impossible to find Searching for one man in this city is like looking for a needle in a haystack.
    See the Oxford Advanced American Dictionary entry: haystack