Definitions for debit card
Random House Webster's College Dictionary
a plastic card through which payments for purchases are made electronically from the bank account of the cardholder.
Origin of debit card:
a card (usually plastic) that enables the holder to withdraw money or to have the cost of purchases charged directly to the holder's bank account
Kernerman English Learner's Dictionary
debit card(noun)ˈdɛb ɪt
a plastic card that takes money directly from your bank account when you use it to pay
A card much like a credit card, but which takes money directly from the bank account, rather than borrowing money at a rate of interest, and uses a PIN instead of a signature.