[stand-bahy] 
noun, plural -bys, adjective | 1. | a staunch supporter or adherent; one who can be relied upon. |
| 2. | something upon which one can rely and therefore choose or use regularly. |
| 3. | something or someone held ready to serve as a substitute, esp. a radio or television program used as a filler in case of cancellation of a regularly scheduled program. |
| 4. | 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. |
| 5. | kept readily available for use in an emergency, shortage, or the like: a standby player. |
| 6. | of or pertaining to last-minute accommodations, the transport that offers them, or a traveler who is waiting for them: a standby flight. |
| 7. | of or pertaining to a waiting period. Also, stand by. |
| 8. | on standby, in a state of readiness to act, respond, or be used immediately when needed. |
| stand·by (stānd'bī') n. pl. stand·bys
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