standby
1. something that can be relied on when needed (Freq. 1) • Derivationally related forms: stand by • Hypernyms: thing 2. an actor able to replace a regular performer when required • Syn: understudy • Derivationally related forms: stand by, understudy (for: understudy) • Hypernyms: actor, histrion, player, thespian, role player
ready for emergency use - a standby generator - a standby crew • Similar to: secondary
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