noun

• (dated) A vehicle operated mechanically, such as an automobile or an airplane.
  "As he stood directly beneath a brilliant arc light, waiting for a limousine that was approaching to pass him, he heard his name called in a sweet feminine voice. Looking up, he met the smiling eyes of Olga de Coude as she leaned forward upon the back seat of the machine. He bowed very low in response to her friendly greeting. When he straightened up the machine had borne her away."
• (telephony, abbreviation) An answering machine or, by extension, voice mail.
  "I called you earlier, but all I got was the machine."
• (computing) A computer.
  "Game developers assume they're pushing the limits of the machine."
• (figuratively) A person or organisation that seemingly acts like a machine, being particularly efficient, single-minded, or unemotional.
  "Bruce Campbell was a "demon-killing machine" because he made quick work of killing demons."