The Collaborative International Dictionary of English v.0.48:

Range \Range\ (r[=a]nj), v. t. [imp. & p. p. Ranged
   (r[=a]njd); p. pr. & vb. n. Ranging (r[=a]n"j[i^]ng).] [OE.
   rengen, OF. rengier, F. ranger, OF. renc row, rank, F. rang;
   of German origin. See Rank, n.]
   1. To set in a row, or in rows; to place in a regular line or
      lines, or in ranks; to dispose in the proper order; to
      rank; as, to range soldiers in line.
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            Maccabeus ranged his army by bands.   --2 Macc. xii.
                                                  20.
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   2. To place (as a single individual) among others in a line,
      row, or order, as in the ranks of an army; -- usually,
      reflexively and figuratively, (in the sense) to espouse a
      cause, to join a party, etc.
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            It would be absurd in me to range myself on the side
            of the Duke of Bedford and the corresponding
            society.                              --Burke.
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   3. To separate into parts; to sift. [Obs.] --Holland.
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   4. To dispose in a classified or in systematic order; to
      arrange regularly; as, to range plants and animals in
      genera and species.
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   5. To rove over or through; as, to range the fields.
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            Teach him to range the ditch, and force the brake.
                                                  --Gay.
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   6. To sail or pass in a direction parallel to or near; as, to
      range the coast.
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   Note: Compare the last two senses (5 and 6) with the French
         ranger une c[^o]te.
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   7. (Biol.) To be native to, or to live in; to frequent.
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WordNet (r) 3.0 (2006):

ranging
    adj 1: wandering freely; "at night in bed...his slowly ranging
           thoughts...encountered her"