noun

• A machine or robot designed to follow a precise sequence of instructions.
• A person who acts like a machine or robot, often defined as having a monotonous lifestyle and lacking in emotion.
• A formal system, such as a finite-state machine or cellular automaton.
• A toy in the form of a mechanical figure.
• (dated) The self-acting power of the muscular and nervous systems, by which movement is effected without intelligent determination.