duty room; staff room; waiting room
staying at home (to prevent the spread of illness, etc.); self-quarantine; self-isolation; being on furlough; being temporarily laid off
waiting room; duty room; standby room
waiting period; quarantine period
child on the waiting list (for a kindergarten, nursery school, etc.)
standby electricity consumption; power use by devices on standby; phantom load
person on a waiting list; person waiting for something; person quarantining