The Collaborative International Dictionary of English v.0.48:

Meta- \Met"a-\, Met- \Met-\ [Gr. meta` between, with, after;
   akin to AS. mid with, G. mit, Goth. mi[thorn], E. mid, in
   midwife.]
   1. A prefix meaning between, with, after, behind, over,
      about, reversely; as, metachronism, the error of placing
      after the correct time; metaphor, lit., a carrying over;
      metathesis, a placing reversely.
      [1913 Webster]

   2. (Chem.) A prefix denoting:
      (a) Other; duplicate, corresponding to; resembling; hence,
          metameric; as, meta-arabinic, metaldehyde.
      (b) (Organic Chem.) That two replacing radicals, in the
          benzene nucleus, occupy the relative positions of 1
          and 3, 2 and 4, 3 and 5, 4 and 6, 5 and 1, or 6 and 2;
          as, metacresol, etc. See Ortho-, and Para-.
      (c) (Inorganic Chem.) Having less than the highest number
          of hydroxyl groups; -- said of acids; as,
          metaphosphoric acid. Also used adjectively.
          [1913 Webster]

   3. A prefix meaning at a level above, as in metaphysics,
      metalanguage.
      [PJC]

U.S. Gazetteer Places (2000):

Meta, MO -- U.S. city in Missouri
   Population (2000):    249
   Housing Units (2000): 130
   Land area (2000):     0.335267 sq. miles (0.868338 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.335267 sq. miles (0.868338 sq. km)
   FIPS code:            47594
   Located within:       Missouri (MO), FIPS 29
   Location:             38.312471 N, 92.167999 W
   ZIP Codes (1990):     65058
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Meta, MO
    Meta