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English definition of “stamp”

stamp

noun [C]
 
 
/stæmp/ COMMUNICATIONS
(also formal postage stamp) a small piece of paper with a picture or pattern on it, that you stick onto a letter or package to pay for the cost of mailing it: first-class/second-class stamp
a tool used to put a date, an address, or other mark on a document or an object, usually as proof of something: The assistant uses a stamp to sign his boss's name.
an official mark put on something that shows a date, an address, or other information: Look for the official USDA stamp before you buy.
stamp of approval approval from someone in a position of authority: The Board will meet Thursday to discuss the contract and is likely to give its stamp of approval Friday. The foreign-made goods still have not earned the government's stamp of approval.
→ See also date stamp noun, food stamp, revenue stamp, rubber stamp
(Definition of stamp noun from the Cambridge Business English Dictionary © Cambridge University Press)
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