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Definition: token


(1) An item that is the equivalent of something else. In the physical world, tokens take the place of coins and tickets. In the digital world, tokens are data that represent other data. See authentication token, crypto token and Ethereum token.

(2) A frame in a communications network. See token passing.

(3) A dynamically assigned number for a Europay, MasterCard and Visa (EMV) credit or debit card transaction. The token is used in place of the "primary account number" (PAN) on the card. See EMV.

(4) In programming, a string of characters. For example, in the C expression #define MAXAMOUNT 50000, MAXAMOUNT is the token.