robot

noun

1. 1.A machine built to carry out some complex task or group of tasks by physically moving, especially one which can be programmed.
2. 2.An intelligent mechanical being designed to look like a human or other creature, and usually made from metal.
3. 3.A person who does not seem to have any emotions.
4. 4.A traffic light (from earlier robot policeman).
5. 5.A theodolite which follows the movements of a prism and can be used by a one-man crew.