noun: Time when the activity of a business is diminished; off-season.
noun: (electronics) The time interval when no current flows.
noun: (medicine) Time when the medication for a chronic condition is less effective in controlling symptoms.
noun: (racing) The point in time when the official starter signals that a race begins, as distinct from the time the race is scheduled to start (post time).
adjective: Alternative form of off-time [(social psychology) Occurring at a time other than the normal point in the process of growth and development.]