adj. 1. (Sewage treatment) treated with aeration and bacteria to aid decomposition; -- of sewage [ WordNet 1.5 ]
3. (Physics) made reactive or more reactive; -- of e.g. a molecule Syn. -- activated, excited [ WordNet 1.5 ]
4. rendered active; -- as e.g. radioactive or luminescent or photosensitive or conductive Syn. -- activated [ WordNet 1.5 ]
5. (Military) set up and placed on active assignment a newly activated unit Syn. -- activated [ WordNet 1.5 ]