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English definition of “confirm”

confirm

verb [I or T] (MAKE CERTAIN)    /kənˈfɜːm/ US  /-ˈfɝːm/
B1 to make an arrangement or meeting certain, often by phone or writing: [+ that] Six people have confirmed that they will be attending and ten haven't replied yet. Flights should be confirmed 48 hours before departure. I've accepted the job over the phone, but I haven't confirmed in writing yet.Planning, expecting and arrangingPlotting and trapping
(Definition of confirm verb (MAKE CERTAIN) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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