The Collaborative International Dictionary of English v.0.48:

Bunch \Bunch\, v. i. [imp. & p. p. Bunched; p. pr. & vb. n.
   Bunching.]
   To swell out into a bunch or protuberance; to be protuberant
   or round.
   [1913 Webster]

         Bunching out into a large round knob at one end.
                                                  --Woodward.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bunch \Bunch\ (b[u^]nch; 224), n. [Akin to OSw. & Dan. bunke
   heap, Icel. bunki heap, pile, bunga tumor, protuberance; cf.
   W. pwng cluster. Cf. Bunk.]
   1. A protuberance; a hunch; a knob or lump; a hump.
      [1913 Webster]

            They will carry . . . their treasures upon the
            bunches of camels.                    --Isa. xxx. 6.
      [1913 Webster]

   2. A collection, cluster, or tuft, properly of things of the
      same kind, growing or fastened together; as, a bunch of
      grapes; a bunch of keys.
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   3. (Mining) A small isolated mass of ore, as distinguished
      from a continuous vein. --Page.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bunch \Bunch\, v. t.
   To form into a bunch or bunches.
   [1913 Webster]

WordNet (r) 3.0 (2006):

bunch
    n 1: a grouping of a number of similar things; "a bunch of
         trees"; "a cluster of admirers" [syn: bunch, clump,
         cluster, clustering]
    2: an informal body of friends; "he still hangs out with the
       same crowd" [syn: crowd, crew, gang, bunch]
    3: any collection in its entirety; "she bought the whole
       caboodle" [syn: bunch, lot, caboodle]
    v 1: form into a bunch; "The frightened children bunched
         together in the corner of the classroom" [syn: bunch
         together, bunch, bunch up]
    2: gather or cause to gather into a cluster; "She bunched her
       fingers into a fist" [syn: bunch, bunch up, bundle,
       cluster, clump]