atm Meaning, Definition & Usage

1. noun a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade
   standard pressure; atmosphere; standard atmosphere.
   
2. noun a means of digital communications that is capable of very high speeds; suitable for transmission of images or voice or video as well as data
   asynchronous transfer mode.
   
   • ATM is used for both LAN and WAN
3. noun an unattended machine (outside some banks) that dispenses money when a personal coded card is used
   cash machine; automatic teller; automated teller machine; automated teller; automatic teller machine; cash dispenser.
   

WordNet