ATM
noun
uk/ˌeɪtiːˈem/ us [ C ] BANKING
abbreviation for automated/automatic teller machine: a machine, usually outside a bank, which customers can use to get money out or manage their account by using a plastic card together with a PIN (= a secret number):
an ATM card/machine
ATM charges/transactions/withdrawals Most banks now offer free ATM transactions.
See also
cash dispenser
cash machine
Cashpoint
[ U ] IT
abbreviation for Asynchronous Transfer Mode: a way of sending data from one computer to another