Meaning – A card holder is a piece of hardware that acts a conduit between a computer card and the motherboard. It also offers a safe and protective way to hold the computer card, while it operates, and prevents it from getting damaged or worn out.
In the context if e-commerce, a card holder is a person who holds the valid form of payment to initiate and complete transactions. Here, the card could refer to a number options, the most common ones being the credit card and debit card.
Example of usage – “When she took her family out to dinner, the bill was paid by her as she was the cardholder in the group.”