Definition of aplomb noun from the Oxford Advanced American Dictionary

 

aplomb

 noun
noun
NAmE//əˈplɑm//
 
, NAmE//əˈplʌm//
 
[uncountable]
 
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if someone does something with aplomb, they do it in a confident and successful way, often in a difficult situation with considerable/great/remarkable aplomb He delivered the speech with his usual aplomb.
See the Oxford Advanced Learner's Dictionary entry: aplomb