WordNet (r) 3.0 (2006):

atm
    n 1: a unit of pressure: the pressure that will support a column
         of mercury 760 mm high at sea level and 0 degrees
         centigrade [syn: standard atmosphere, atmosphere,
         atm, standard pressure]
    2: 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"
       [syn: asynchronous transfer mode, ATM]
    3: an unattended machine (outside some banks) that dispenses
       money when a personal coded card is used [syn: cash
       machine, cash dispenser, automated teller machine,
       automatic teller machine, automated teller, automatic
       teller, ATM]

V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

ATM
       Abstract Test Method (ISO 9646-1)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

ATM
       Adobe Type Manager


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

ATM
       Asynchronous Transfer Mode (ATM)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

ATM
       At The Moment (slang, Usenet, IRC)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

ATM
       Automatic Teller Machine


The Free On-line Dictionary of Computing (30 December 2018):

ATM

   1.  Asynchronous Transfer Mode.

   2. Automatic Teller Machine - a cash dispenser.

   3.  At the moment.

   4.  Adobe Type Manager.