Debit/ˈdebɪt/ Definition 1 of 3Pro Tip 1/3Payment Method In everyday language, 'debit' refers to a type of bank card used for transactions. I prefer to use my debit card rather than carrying cash. Pro Tip 2/3Not Credit 'Debit' differs from 'credit' because it uses available funds, not borrowed money. I avoid debt by using my debit card. Pro Tip 3/3Immediate Effect A 'debit' transaction immediately decreases your bank balance. The coffee shop’s debit reduced my account balance instantly.