proof coin

noun

Definition of proof coin

: a coin not intended for circulation but struck from a new, highly-polished die on a polished planchet and sometimes in a metal different from a coin of identical denomination struck for circulation As one of the world's largest proof coins, it contains an enormous four full ounces of pure silver!The Numismatist, April 1988

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Cite this Entry

“Proof coin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/proof%20coin. Accessed 26 Oct. 2021.

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