noun a device or piece of equipment used to hold or carry cards
A card carrier is a person or entity that holds or is responsible for a credit card, debit card, or any other type of financial card.
In the realm of technology, a card carrier can refer to a device or mechanism that stores and reads data from cards, such as a card reader or a card holder.
Within transportation, a card carrier can be a passenger who holds a ticket or pass for public transportation, like a bus or subway card.
In the insurance industry, a card carrier refers to the individual or organization that possesses an insurance card, such as a health insurance card or auto insurance card.