The Collaborative International Dictionary of English v.0.48:

Thither \Thith"er\, adv. [OE. thider, AS. [eth]ider; akin to E.
   that; cf. Icel. [thorn]a[eth]ra there, Goth.
   [thorn]a[thorn]r[=o] thence. See That, and The.]
   1. To that place; -- opposed to hither.
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            This city is near; . . . O, let me escape thither.
                                                  --Gen. xix.
                                                  20.
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            Where I am, thither ye can not come.  --John vii.
                                                  34.
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   2. To that point, end, or result; as, the argument tended
      thither.
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   Hither and thither, to this place and to that; one way and
      another.
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   Syn: There.

   Usage: Thither, There. Thither properly denotes motion
          toward a place; there denotes rest in a place; as, I
          am going thither, and shall meet you there. But
          thither has now become obsolete, except in poetry, or
          a style purposely conformed to the past, and there is
          now used in both senses; as, I shall go there
          to-morrow; we shall go there together.
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The Collaborative International Dictionary of English v.0.48:

Hither \Hith"er\, adv. [OE. hider, AS. hider; akin to Icel.
   h[=e][eth]ra, Dan. hid, Sw. hit, Goth. hidr[=e]; cf. L. citra
   on this side, or E. here, he. [root]183. Cf. He.]
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   1. To this place; -- used with verbs signifying motion, and
      implying motion toward the speaker; correlate of hence and
      thither; as, to come or bring hither.
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   2. To this point, source, conclusion, design, etc.; -- in a
      sense not physical.
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            Hither we refer whatsoever belongeth unto the
            highest perfection of man.            --Hooker.
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   Hither and thither, to and fro; backward and forward; in
      various directions. "Victory is like a traveller, and
      goeth hither and thither." --Knolles.
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WordNet (r) 3.0 (2006):

hither and thither
    adv 1: from one place or situation to another; "we were driven
           from pillar to post" [syn: from pillar to post, hither
           and thither]