(banking) A device that provides bank customers with cash withdrawal and other services without the need for a human teller.

plural of automatic teller machine

(computing theory) A particular type of theoretical computer, with infinitely many memory cells, called registers, and formal rules to determine the machine's behavior based on their contents.

plural of unlimited register machine

(US) A comical, overcomplicated machine which performs a simple task. / (by extension) Anything that is overly complicated.

Something that operates capably through the effective coordination of many parts.

plural of well-oiled machine

Synonym of answering machine

plural of automated teller machine

(computing) A computer that implements the von Neumann architecture. / (science fiction) Any machine that is capable of self-replication.