1. (

• standard_atmosphere ,
• atmosphere ,
• atm ,
• standard_pressure

) a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade ;

2. (

• asynchronous_transfer_mode ,
• 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. (

• cash_machine ,
• cash_dispenser ,
• automated_teller_machine ,
• automatic_teller_machine ,
• automated_teller ,
• automatic_teller ,
• ATM

) an unattended machine (outside some banks) that dispenses money when a personal coded card is used ;