WordNet sense 1 (a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade):

atmosphere, standard atmosphere, standard pressure

WordNet sense 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):

asynchronous transfer mode

WordNet sense 3 (an unattended machine (outside some banks) that dispenses money when a personal coded card is used):

cash machine, automated teller, automated teller machine, automatic teller, automatic teller machine, cash dispenser