Open English Wordnet
Nouns
(n)asynchronous transfer mode, ATMa means of digital communications that is capable of very high speeds; suitable for transmission of images or voice or video as well as data“ATM is used for both LAN and WAN”
(n)cash machine, cash dispenser, automated teller machine, automatic teller machine, automated teller, automatic teller, ATMan unattended machine (outside some banks) that dispenses money when a personal coded card is used