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standby

1 standby /ˈstændˌbaɪ/ noun
plural standbys /ˈstændˌbaɪz/
1 standby
/ˈstændˌbaɪ/
noun
plural standbys /ˈstændˌbaɪz/
Britannica Dictionary definition of STANDBY
[count]
: a person or thing that is available especially in emergencies
see also stand by at 1stand

on standby

: ready or available for immediate action or use
: ready to travel if a ticket becomes available
2 standby /ˈstændˌbaɪ/ adjective
2 standby
/ˈstændˌbaɪ/
adjective
Britannica Dictionary definition of STANDBY
always used before a noun
: relating to or traveling by an airline service in which the passenger must wait for an available seat see also stand by at 1stand