Simple past tense and past participle of stamp.(verb)
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Use "stamped" in a sentence
"A full 80% of the fine-jewelry sales is still made up of unbranded pieces, Mr. Boruchow says, but for many consumers, a label stamped on the metal gives them confidence to buy."
"She had 364 pages, all clay-coated stock, and was cloth bound in faded saffron buckram with her title stamped in silver on the cover and spine."
"I looked more closely at the badge, the imprint of the American flag, and the name stamped on it."