acquirer (Noun) — A person who acquires something (usually permanently).
acquirer (Noun) — A corporation gaining financial control over another corporation or financial institution through a payment in cash or an exchange of stock.
acquirer (Noun) — The financial institution that dispenses cash in automated teller machines and collects a fee from the bank that issued the credit card.
acquirer (Noun) — A credit card processing bank; merchants receive credit for credit card receipts less a processing fee.