not in physical motion
"the inertia of an object at rest"
not active physically or mentally
"illness forced him to live an inactive life"
"dreamy and inactive by nature"
not engaged in full-time work
"an inactive member"
lying idle or unused
"an inactive mine"
lacking in energy or will
"Much benevolence of the passive order may be traced to a disinclination to inflict pain upon oneself"- George Meredith
(of e.g. volcanos) not erupting and not extinct
"a dormant volcano"
not exerting influence or change
(military) not involved in military operations
(pathology) not progressing or increasing
or progressing slowly
(chemistry) not participating in a chemical reaction
"desired amounts of inactive chlorine"