1. The state or quality of being inactive; inertness; as, the
inactivity of matter.
2. Idleness; habitual indisposition to action or exertion; want of
energy; sluggishness.
The gloomy inactivity of despair.
Cook.
In*ac"tose (?), n. (Chem.) A variety of sugar, found in certain plants.
It is optically inactive.