Definition of cucumber noun from the Oxford Advanced American Dictionary

 

cucumber

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