[1] : The Collaborative International Dictionary of English v.0.48

weight \weight\, v. t. imp.  p. p. weighted; p. pr.  vb. n.
   weighting.
   1913 webster
   1. to load with a weight or weights; to load down; to make
      heavy; to attach weights to; as, to weight a horse or a
      jockey at a race; to weight a whip handle.
      1913 webster

            the arrows of satire, . . . weighted with sense.
                                                  --coleridge.
      1913 webster

   2. astron.  physics to assign a weight to; to express by a
      number the probable accuracy of, as an observation. see
      weight of observations, under weight.
      1913 webster

   3. dyeing to load fabrics as with barite, to increase the
      weight, etc.
      webster 1913 suppl.

   4. math. to assign a numerical value expressing relative
      importance to a measurement, to be multiplied by the
      value of the measurement in determining averages or other
      aggregate quantities; as, they weighted part one of the
      test twice as heavily as part 2.
      pjc
      1913 webster
see also:
weighted weighting weight of observations weight 

[2] : WordNet (r) 2.0

weighting
     n : statistics a coefficient assigned to elements of a
         frequency distribution in order to represent their
         relative importance syn: weight
see also:
weight 

Weighting >> W Words
Weighting, definition of term: Weighting
weighting_pag1.html