- a staunch supporter or adherent; one who can be relied upon.
- something upon which one can rely and therefore choose or use regularly.
- something or someone held ready to serve as a substitute, especially a radio or television program used as a filler in case of cancellation of a regularly scheduled program.
- a traveler who is waiting for last-minute accommodations to become available on a plane, train, or other transport as a result of a cancellation.
- kept readily available for use in an emergency, shortage, or the like: a standby player.
- of or relating to last-minute accommodations, the transport that offers them, or a traveler who is waiting for them: a standby flight.
- of or relating to a waiting period.
- in a state of readiness to act, respond, or be used immediately when needed.
- to be available and ready to act if needed or called upon
- to be present as an onlooker or without taking any action
- to be faithful to
- (of the Crown) to challenge (a juror) without needing to show cause
- a person or thing that is ready for use or can be relied on in an emergency
- (as modifier)
- in a state of readiness for action or use
- (of an airline passenger, fare, or seat) not booked in advance but awaiting or subject to availability
