| Noun | 1. | atm - a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrades.t.p., STP - standard temperature and pressure | |
| 2. | ATM - 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; "ATM is used for both LAN and WAN" | |
| 3. | ATM - an unattended machine (outside some banks) that dispenses money when a personal coded card is usedmachine - any mechanical or electrical device that transmits or modifies energy to perform or assist in the performance of human tasks | |