n.
Pronunciation: ' stan(d)- ˌ b ī
Function: noun
Inflected Form: plural stand · bys \ - ˌ b ī z \
Date: 1796
1 a : one to be relied on especially in emergencies b : a favorite or reliable choice or resource
2 : one that is held in reserve ready for use : SUBSTITUTE
– on standby : ready or available for immediate action or use