Definition from macmillandictionary.com
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a confident mood/smile/manner
I was starting to feel more confident about the exam.
He is confident in his ability to do the job well.
a supremely confident young man
They are quietly confident that the business is progressing as it should.
We were confident of victory.
We are confident that the show will open on Thursday.
You can go out, confident in the knowledge that your house is safe.