Definition of mettle noun from the Oxford Advanced Learner's Dictionary

 

mettle

 noun
noun
BrE BrE//ˈmetl//
 
; NAmE NAmE//ˈmetl//
 
[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.
  • Word Origin mid 16th cent.: specialized spelling (used for figurative senses) of metal.Idioms 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 American Dictionary entry: mettle