Source : Webster's Revised Unabridged Dictionary (1913)

Size \Size\, v. t. [imp. & p. p. {Sized}; p. pr. & vb. n.
   {Sizing}.]
   To cover with size; to prepare with size.

Size \Size\, n. [Abbrev. from assize. See {Assize}, and cf.
   {Size} glue.]
   1. A settled quantity or allowance. See {Assize}. [Obs.] ``To
      scant my sizes.'' --Shak.

   2. (Univ. of Cambridge, Eng.) An allowance of food and drink
      from the buttery, aside from the regular dinner at
      commons; -- corresponding to battel at Oxford.

   3. Extent of superficies or volume; bulk; bigness; magnitude;
      as, the size of a tree or of a mast; the size of a ship or
      of a rock.

   4. Figurative bulk; condition as to rank, ability, character,
      etc.; as, the office demands a man of larger size.

            Men of a less size and quality.       --L'Estrange.

            The middling or lower size of people. --Swift.

   5. A conventional relative measure of dimension, as for
      shoes, gloves, and other articles made up for sale.

   6. An instrument consisting of a number of perforated gauges
      fastened together at one end by a rivet, -- used for
      ascertaining the size of pearls. --Knight.

   {Size roll}, a small piese of parchment added to a roll.

   {Size stick}, a measuring stick used by shoemakers for
      ascertaining the size of the foot.

   Syn: Dimension; bigness; largeness; greatness; magnitude.

Size \Size\, v. i.
   1. To take greater size; to increase in size.

            Our desires give them fashion, and so, As they wax
            lesser, fall, as they size, grow.     --Donne.

   2. (Univ. of Cambridge, Eng.) To order food or drink from the
      buttery; hence, to enter a score, as upon the buttery
      book.

Size \Size\, n. [See {Sice}, and {Sise}.]
   Six.

Size \Size\, n. [OIt. sisa glue used by painters, shortened fr.
   assisa, fr. assidere, p. p. assiso, to make to sit, to seat,
   to place, L. assidere to sit down; ad + sidere to sit down,
   akin to sedere to sit. See {Sit}, v. i., and cf. {Assize},
   {Size} bulk.]
   1. A thin, weak glue used in various trades, as in painting,
      bookbinding, paper making, etc.

   2. Any viscous substance, as gilder's varnish.

Size \Size\, v. t.
   1. To fix the standard of. ``To size weights and measures.''
      [R.] --Bacon.

   2. To adjust or arrange according to size or bulk.
      Specifically:
      (a) (Mil.) To take the height of men, in order to place
          them in the ranks according to their stature.
      (b) (Mining) To sift, as pieces of ore or metal, in order
          to separate the finer from the coarser parts.

   3. To swell; to increase the bulk of. --Beau. & Fl.

   4. (Mech.) To bring or adjust anything exactly to a required
      dimension, as by cutting.

   {To size up}, to estimate or ascertain the character and
      ability of. See 4th {Size}, 4. [Slang, U.S.]

            We had to size up our fellow legislators. --The
                                                  Century.

Source : WordNet®

size
     v 1: cover or stiffen or glaze a porous material with size or
          sizing (a glutinous substance)
     2: sort according to size
     3: make to a size; bring to a suitable size

size
     n 1: the physical magnitude of something (how big it is); "a wolf
          is about the size of a large dog"
     2: the property resulting from being one of a series of
        graduated measurements (as of clothing); "he wears a size
        13 shoe"
     3: any glutinous material used to fill pores in surfaces or to
        stiffen fabrics; "size gives body to a fabric" [syn: {sizing}]
     4: the actual state of affairs; "that's the size of the
        situation"; "she hates me, that's about the size of it"
        [syn: {size of it}]
     5: a large magnitude; "he blanched when he saw the size of the
        bill"; "the only city of any size in that area"

size
     adj : (used in combination) sized; "the economy-size package";
           "average-size house"