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English definition of “stamp”

stamp

noun [C]     /stæmp/
PAPER (also postage stamp) A2 a small, official piece of paper that you buy and stick onto a letter or parcel before you post itThe postal system
MARK a tool for putting a special ink mark on something, or the mark made by it: a stamp in a passportWriting implements
stamp of approval official, public approval: The president has put his stamp of approval on the proposal.Approving and approvalAccepting and agreeingAccepting and agreeing reluctantly
(Definition of stamp noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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