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English definition of “sure thing”

sure thing

noun [C usually sing]  /ˈʃʊər ˈθɪŋ/  /ˈʃoʊr ˈθɪŋ/
something certain to win or succeed: Your promotion is a sure thing – you’re the best person for the job.
(Definition of sure thing noun from the Cambridge Academic Content Dictionary © Cambridge University Press)

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