Source : Webster's Revised Unabridged Dictionary (1913)

Cluster \Clus"ter\, v. t.
   To collect into a cluster or clusters; to gather into a bunch
   or close body.

         Not less the bee would range her cells, . . . The
         foxglove cluster dappled bells.          --Tennyson.

         Or from the forest falls the clustered snow. --Thomson.

   {Clustered column} (Arch.), a column which is composed, or
      appears to be composed, of several columns collected
      together.

Cluster \Clus"ter\, n. [AS. cluster, clyster; cf. LG. kluster
   (also Sw. & Dan. klase a cluster of grapes, D. klissen to be
   entangled?.)]
   1. A number of things of the same kind growing together; a
      bunch.

            Her deeds were like great clusters of ripe grapes,
            Which load the bunches of the fruitful vine.
                                                  --Spenser.

   2. A number of similar things collected together or lying
      contiguous; a group; as, a cluster of islands. ``Cluster
      of provinces.'' --Motley.

   3. A number of individuals grouped together or collected in
      one place; a crowd; a mob.

            As bees . . . Pour forth their populous youth about
            the hive In clusters.                 --Milton.

            We loved him; but, like beasts And cowardly nobles,
            gave way unto your clusters, Who did hoot him out o'
            the city.                             --Shak.

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.

         His sunny hair Cluster'd about his temples, like a
         god's.                                   --Tennyson.

         The princes of the country clustering together. --Foxe.

Source : WordNet®

cluster
     n : a grouping of a number of similar things; "a bunch of
         trees"; "a cluster of admirers" [syn: {bunch}, {clump}, {clustering}]
     v 1: come together as in a cluster or flock; "The poets
          constellate in this town every summer" [syn: {constellate},
           {flock}, {clump}]
     2: gather or cause to gather into a cluster; "She bunched her
        fingers into a fist"; "The students bunched up at the
        registration desk" [syn: {bunch}, {bunch up}, {bundle}, {clump}]

Source : Free On-Line Dictionary of Computing

cluster
     
         An elementary unit of allocation of a disk made
        up of one or more physical {blocks}.
     
        A {file} is made up of a whole number of possibly
        non-contiguous clusters.  The cluster size is a tradeoff
        between space efficiency (the bigger is the cluster, the
        bigger is on the average the wasted space at the end of each
        file) and the length of the {FAT}.
     
        (1996-11-04)