American English

Definition of mettle noun from the Oxford Advanced American Dictionary

 

mettle

 noun
noun
NAmE//ˈmɛt̮l//
 
[uncountable]
 
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  • the ability and determination to do something successfully despite difficult conditions The next game will be a real test of their mettle. She really showed her mettle under pressure.
  • Idioms
    on your mettle
     
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    prepared to use all your skills, knowledge, etc. because you are being tested The team will be on their mettle for the big game.
    See the Oxford Advanced Learner's Dictionary entry: mettle