Source : WordNet®

activated
     adj 1: (of sewage) treated with aeration and bacteria to aid
            decomposition
     2: of e.g. a molecule; made reactive or more reactive [syn: {excited}]
     3: rendered active; e.g. rendered radioactive or luminescent or
        photosensitive or conductive
     4: set up and placed on active assignment; "a newly activated
        unit"