Source : Webster's Revised Unabridged Dictionary (1913)

Region \Re"gion\ (r?"j?n), n. [F. r['e]gion, from L. regio a
   direction, a boundary line, region, fr. regere to guide,
   direct. See {Regimen}.]
   1. One of the grand districts or quarters into which any
      space or surface, as of the earth or the heavens, is
      conceived of as divided; hence, in general, a portion of
      space or territory of indefinite extent; country;
      province; district; tract.

            If thence he 'scappe, into whatever world, Or
            unknown region.                       --Milton.

   2. Tract, part, or space, lying about and including anything;
      neighborhood; vicinity; sphere. ``Though the fork invade
      the region of my heart.'' --Shak.

            Philip, tetrarch of .. the region of Trachonitis.
                                                  --Luke iii. 1.

   3. The upper air; the sky; the heavens. [Obs.]

            Anon the dreadful thunder Doth rend the region.
                                                  --Shak.

   4. The inhabitants of a district. --Matt. iii. 5.

   5. Place; rank; station. [Obs. or R.]

            He is of too high a region.           --Shak.

Source : WordNet®

region
     n 1: the extended spatial location of something; "the farming
          regions of France"; "religions in all parts of the
          world"; "regions of outer space" [syn: {part}]
     2: a part of an animal that has a special function or is
        supplied by a given artery or nerve; "in the abdominal
        region" [syn: {area}]
     3: a large indefinite location on the surface of the Earth;
        "penguins inhabit the polar regions"
     4: the approximate amount of something (usually used
        prepositionally as in `in the region of'); "it was going
        to take in the region of two or three months to finish the
        job"; "the price is in the neighborhood of $100" [syn: {neighborhood}]
     5: a knowledge domain that you are interested in or are
        communicating about; "it was a limited domain of
        discourse"; "here we enter the region of opinion"; "the
        realm of the occult" [syn: {domain}, {realm}]