1stand·by 
/ˈstændˌbaɪ/ noun
plural stand·bys /ˈstændˌbaɪ/ noun /ˈstændˌbaɪz/ [count] : a person or thing that is available especially in emergencies
▪ More police officers were sent as standbys. ▪ We bought an electric generator as a standby. — see also stand by at 1stand
▪ More police officers were sent as standbys. ▪ We bought an electric generator as a standby. — see also stand by at 1stand
on standby 1 : ready or available for immediate action or use
▪ The police officers were put on standby. 2 : ready to travel if a ticket becomes available
▪ We're on standby for the next flight to Washington, D.C.
▪ The police officers were put on standby.
▪ We're on standby for the next flight to Washington, D.C.
