From The Collaborative International Dictionary of English v.0.48 :
activated \activated\ 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]
From WordNet (r) 3.0 (2006) :
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:
activated, excited]
3: rendered active; e.g. rendered radioactive or luminescent or
photosensitive or conductive
4: (military) set up and placed on active assignment; "a newly
activated unit"