Source : Webster's Revised Unabridged Dictionary (1913)

Blend \Blend\, v. t. [imp. & p. p. {Blended} or {Blent}; p. pr.
   & vb. n. {Blending}.] [OE. blenden, blanden, AS. blandan to
   blend, mix; akin to Goth. blandan to mix, Icel. blanda, Sw.
   blanda, Dan. blande, OHG. blantan to mis; to unknown origin.]
   1. To mix or mingle together; esp. to mingle, combine, or
      associate so that the separate things mixed, or the line
      of demarcation, can not be distinguished. Hence: To
      confuse; to confound.

            Blending the grand, the beautiful, the gay.
                                                  --Percival.

   2. To pollute by mixture or association; to spoil or corrupt;
      to blot; to stain. [Obs.] --Spenser.

   Syn: To commingle; combine; fuse; merge; amalgamate;
        harmonize.

Blending \Blend"ing\, n.
   1. The act of mingling.

   2. (Paint.) The method of laying on different tints so that
      they may mingle together while wet, and shade into each
      other insensibly. --Weale.

Source : WordNet®

blending
     adj : combining or mixing [syn: {merging}, {mingling}]
     n 1: the act of blending components together thoroughly [syn: {blend}]
     2: a gradation involving small or imperceptible differences
        between grades [syn: {shading}]