To substitute for; to replace; (theater) to serve as an understudy. / To make one of a party in a bet or other speculation. / To take a side in a dispute.

A substitute; a replacement.

A person of similar size and shape to an actor who "stands in" for that actor during the lengthy process of setting up a shot, but who, unlike a double, does not appear in the film. / A substitute.

(idiomatic, transitive) To replace; to act as a double or substitute for.

present participle of stand in

Third-person singular simple present indicative form of stand in

In the current state or circumstance.

Third-person singular simple present indicative form of stand for

present participle of stand for

Alternative form of stand-to / To tolerate (something); to be able to withstand (something) stressful that will be ultimately beneficial.