1.Definition: (chemistry) not participating in a chemical reaction; chemically inert
"Desired amounts of inactive chlorine"
2.Definition: (military) not involved in military operations
3.Definition: (of e.g. volcanos) not erupting and not extinct
4.Definition: (pathology) not progressing or increasing; or progressing slowly
5.Definition: lacking activity; lying idle or unused
"An inactive mine", "Inactive accounts", "Inactive machinery"
6.Definition: lacking in energy or will
7.Definition: not active physically or mentally
"Illness forced him to live an inactive life", "Dreamy and inactive by nature"
8.Definition: not engaged in full-time work
"Inactive reserve", "An inactive member"
9.Definition: not exerting influence or change