ETYM Pref. in- not + active: cf. French inactif.
1. Not active or exerting influence.
2. Not active physically or mentally.
/> 3. Not engaged in full-time work; (military).
4. Not engaged in military action; SYN. reserve.
5. Lacking activity; lying idle or unused.
6. (Pathology) Not progressing or increasing; or progressing slowly.
7. Not participating in a chemical reaction.