American English

Definition of staple adjective from the Oxford Advanced American Dictionary

 

staple

 adjective
adjective
NAmE//ˈsteɪpl//
 
[only before noun]
 
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forming a basic, large, or important part of something The staple crop is rice. Jeans are a staple part of every teenager's wardrobe.
See the Oxford Advanced Learner's Dictionary entry: staple