- standby - ready for emergency use; "a standby generator"; "a standby crew"
Antonym: primary (indirect, via secondary)
- standby - something that can be relied on when needed
--1 is a kind of thing
Derived form: verb stand by2 - understudy, standby - an actor able to replace a regular performer when required
--2 is a kind of actor, histrion, player, thespian, role player
Derived form: verb stand by2