adj. 1. Having a high density of (the indicated substance); as, a narrow thread of concentrated ore. [ Narrower terms: undiluted (vs. diluted) ] [ WordNet 1.5 ]
2. Gathered together or made less diffuse; as, their concentrated efforts; his concentrated attention. Opposite of distributed or diffused. [ Narrower terms: bunched, bunchy, clustered; centered, centred, centralized, focused; undivided ] [ Also See: compact. ] [ WordNet 1.5 ]
3. Intense; in an extreme degree; -- of mental phenomena; as, her concentrated passion held them at bay. [ WordNet 1.5 ]
4. being the most concentrated solution possible at a given temperature; unable to dissolve still more of a substance. Opposite of dilute or unsaturated. [ Narrower terms: supersaturated ]
Syn. -- saturated. [ WordNet 1.5 ]
5. reduced to a stronger or more concentrated form; as, concentrated sulfuric acid. Opposite of diluted.
Syn. -- condensed. [ WordNet 1.5 ]
6. characterized by intensity; especially when imposed from without; -- of actions; as, concentrated study.
Syn. -- intensive. [ WordNet 1.5 ]
7. characterized by mental concentration.
Syn. -- intent. [ WordNet 1.5 +PJC ]