noun

• (now historical) A system of serfdom used in Central Europe, under which a tenant's rent was paid in forced labour.
• (chiefly science fiction) An intelligent mechanical being designed to look like a human or other creature, and usually made from metal.
• A machine built to carry out some complex task or group of tasks by physically moving, especially one which can be programmed.
• (figuratively) A person who does not seem to have any emotions.
• (South Africa) A traffic light (from earlier robot policeman).
• (surveying) A theodolite which follows the movements of a prism and can be used by a one-man crew.
• (dance) A style of dance popular in disco in which the dancer imitates the stiff movements of a stereotypical android robot.
• (Internet slang, 4chan) A habitual poster on the /r9k/ board on 4chan; a member of the /r9k/ community.