stand-in

[ stand-in ]
/ ˈstændˌɪn /

noun

a substitute for a motion-picture star during the preparation of lighting, cameras, etc., or in dangerous scenes.
any substitute.

Origin of stand-in

First recorded in 1930–35; noun use of verb phrase stand in

British Dictionary definitions for stand in

stand in

verb

(intr, adverb usually foll by for) to act as a substitute
stand someone in good stead to be of benefit or advantage to someone

noun stand-in

  1. a person or thing that serves as a substitute
  2. (as modifier)a stand-in teacher
a person who substitutes for an actor during intervals of waiting or in dangerous stunts