Source : Webster's Revised Unabridged Dictionary (1913)

Odd \Odd\, a. [Compar. {Odder}; superl. {Oddest}.] [OE. odde,
   fr.Icel. oddi a tongue of land, a triangle, an odd number
   (from the third or odd angle, or point, of a triangle),
   orig., a point, tip; akin to Icel. oddr point, point of a
   weapon, Sw. udda odd, udd point, Dan. od, AS. ord, OHG. ort,
   G. ort place (cf. E. point, for change of meaning).]
   1. Not paired with another, or remaining over after a
      pairing; without a mate; unmatched; single; as, an odd
      shoe; an odd glove.

   2. Not divisible by 2 without a remainder; not capable of
      being evenly paired, one unit with another; as, 1, 3, 7,
      9, 11, etc., are odd numbers.

            I hope good luck lies in odd numbers. --Shak.

   3. Left over after a definite round number has been taken or
      mentioned; indefinitely, but not greatly, exceeding a
      specified number; extra.

            Sixteen hundred and odd years after the earth was
            made, it was destroyed in a deluge.   --T. Burnet.

            There are yet missing of your company Some few odd
            lads that you remember not.           --Shak.

   4. Remaining over; unconnected; detached; fragmentary; hence,
      occasional; inconsiderable; as, odd jobs; odd minutes; odd
      trifles.

   5. Different from what is usual or common; unusual; singular;
      peculiar; unique; strange. ``An odd action.'' --Shak. ``An
      odd expression.'' --Thackeray.

            The odd man, to perform all things perfectly, is, in
            my poor opinion, Joannes Sturmius.    --Ascham.

            Patients have sometimes coveted odd things.
                                                  --Arbuthnot.

            Locke's Essay would be a very odd book for a man to
            make himself master of, who would get a reputation
            by critical writings.                 --Spectator.

   Syn: Quaint; unmatched; singular; unusual; extraordinary;
        strange; queer; eccentric, whimsical; fantastical;
        droll; comical. See {Quaint}.

Source : WordNet®

odd
     adj 1: not divisible by two [ant: {even}]
     2: not easily explained; "it is odd that his name is never
        mentioned"
     3: an indefinite quantity more than that specified; "invited
        30-odd guests"
     4: beyond or deviating from the usual or expected; "a curious
        hybrid accent"; "her speech has a funny twang"; "they have
        some funny ideas about war"; "had an odd name"; "the
        peculiar aromatic odor of cloves"; "something definitely
        queer about this town"; "what a rum fellow"; "singular
        behavior" [syn: {curious}, {funny}, {peculiar}, {queer}, {rum},
         {rummy}, {singular}]
     5: of the remaining member of a pair, of socks e.g. [syn: {unmatched},
         {unmated}, {unpaired}]
     6: not used up; "leftover meatloaf"; "she had a little money
        left over so she went to a movie"; "some odd dollars
        left"; "saved the remaining sandwiches for supper";
        "unexpended provisions" [syn: {leftover}, {left over(p)},
        {left(p)}, {remaining}, {unexpended}]