From The Collaborative International Dictionary of English v.0.48:
concentrated \concentrated\ adj.
1. Having a high density of (the indicated substance); as, a
narrow thread of concentrated ore.
Note: [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.
Note: [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.
Note: [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]
From The Collaborative International Dictionary of English v.0.48:
Cluster \Clus"ter\, v. i. [imp. & p. p. Clustered; p. pr. &
vb. n. Clustering.]
To grow in clusters or assemble in groups; to gather or unite
in a cluster or clusters.
[1913 Webster]
His sunny hair
Cluster'd about his temples, like a god's. --Tennyson.
[1913 Webster]
The princes of the country clustering together. --Foxe.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
clustered \clustered\ adj.
1. growing close together but not in dense mats; -- of
plants.
[WordNet 1.5]
2. occurring close together in bunches or clusters.
Syn: bunched, bunchy.
[WordNet 1.5]
3. clustered together but not coherent.
Syn: agglomerate, agglomerated, agglomerative, aggregate.
[WordNet 1.5]