Definition of calling card 1a card bearing a person’s name and
address, sent or left in lieu of a formal social or business
visit. an action by which someone or something can be
identified:a dog whose calling card is a savage nip at the
nearest ankles 2a card that allows the user to make telephone
calls from any phone and charge the cost to their home telephone
number. a prepaid card that allows the user to make telephone
calls up to a specified value.