(1):

(v. t.) To charge with debt; - the opposite of, and correlative to, credit; as, to debit a purchaser for the goods sold.

(2):

(n.) A debt; an entry on the debtor (Dr.) side of an account; - mostly used adjectively; as, the debit side of an account.

(3):

(v. t.) To enter on the debtor (Dr.) side of an account; as, to debit the amount of goods sold.