Source : Webster's Revised Unabridged Dictionary (1913)

Blend \Blend\, v. i.
   To mingle; to mix; to unite intimately; to pass or shade
   insensibly into each other, as colors.

         There is a tone of solemn and sacred feeling that
         blends with our conviviality.            --Irving.

Blend \Blend\, n.
   A thorough mixture of one thing with another, as color, tint,
   etc., into another, so that it cannot be known where one ends
   or the other begins.

Blend \Blend\, v. t. [AS. blendan, from blind blind. See
   {Blind}, a.]
   To make blind, literally or figuratively; to dazzle; to
   deceive. [Obs.] --Chaucer.

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.

Source : WordNet®

blend
     n 1: an occurrence of thorough mixing
     2: a new word formed by joining two others and combining their
        meanings; "`smog' is a blend of `smoke' and `fog'";
        "`motel' is a portmanteau word made by combining `motor'
        and `hotel'"; "`brunch' is a well-known portmanteau" [syn:
         {portmanteau word}, {portmanteau}]
     3: the act of blending components together thoroughly [syn: {blending}]
     v 1: combine into one; "blend the nuts and raisins together"; "he
          blends in with the crowd"; "We don't intermingle much"
          [syn: {intermix}, {immingle}, {intermingle}]
     2: blend or harmonize; "This flavor will blend with those in
        your dish"; "This sofa won't go with the chairs" [syn: {go},
         {blend in}]
     3: mix together different elements; "The colors blend well"
        [syn: {flux}, {mix}, {conflate}, {commingle}, {immix}, {fuse},
         {coalesce}, {meld}, {combine}, {merge}]