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Definition of cucumber noun from the Oxford Advanced American Dictionary

 

cucumber

 noun
noun
NAmE//ˈkyukʌmbər//
 
[countable, uncountable]
 
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  • a long vegetable with dark green skin and light green flesh, that is usually eaten raw see sea cucumber
    • Idioms
    (as) cool as a cucumber
     
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    very calm and controlled, especially in a difficult situation
    See cucumber in the Oxford Advanced Learner's Dictionary
    Check pronunciation: cucumber

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