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English definition of “standby”

standby

noun [C/U]    /ˈstændˌbɑɪ/ (plural standbys)
something available for use when needed , or the state of being ready for use: I have several meals I use as standbys for unexpected company . Cary also has sought to put more contractors on standby for major storms . If you fly standby, you hold a ticket and are ready to travel when space becomes available on a flight .
(Definition of standby noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
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