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1. a card that establishes a person's identity, esp one issued to all members of the population in wartime, to the staff of an organization, etc
|Noun||1.||identity card - a card certifying the identity of the bearer; "he had to show his card to get in"|
business card - a card on which are printed the person's name and business affiliation
donor card - a card that you carry on your person and that authorizes the use of your organs for transplantation after your death
keycard - a plastic card that has a magnetically coded strip that is scanned in order to operate a mechanism
membership card - a card certifying membership in an organization
ration card - a card certifying the bearer's right to purchase rationed goods
positive identification - evidence proving that you are who you say you are; evidence establishing that you are among the group of people already known to the system; recognition by the system leads to acceptance; "a system for positive identification can prevent the use of a single identity by several people"