The Collaborative International Dictionary of English v.0.48:

Blend \Blend\, v. i.
   To mingle; to mix; to unite intimately; to pass or shade
   insensibly into each other, as colors.
   [1913 Webster]

         There is a tone of solemn and sacred feeling that
         blends with our conviviality.            --Irving.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Blend \Blend\, v. t. [AS. blendan, from blind blind. See
   Blind, a.]
   To make blind, literally or figuratively; to dazzle; to
   deceive. [Obs.] --Chaucer.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Blend \Blend\ (bl[e^]nd), v. t. [imp. & p. p. Blended or
   Blent (bl[e^]nt); 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.
      [1913 Webster]

            Blending the grand, the beautiful, the gay.
                                                  --Percival.
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   2. To pollute by mixture or association; to spoil or corrupt;
      to blot; to stain. [Obs.] --Spenser.
      [1913 Webster]

   Syn: To commingle; combine; fuse; merge; amalgamate;
        harmonize.
        [1913 Webster]

WordNet (r) 3.0 (2006):

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: blend,
       portmanteau word, portmanteau]
    3: the act of blending components together thoroughly [syn:
       blend, blending]
    v 1: combine into one; "blend the nuts and raisins together";
         "he blends in with the crowd"; "We don't intermingle much"
         [syn: blend, 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:
       blend, go, blend in]
    3: mix together different elements; "The colors blend well"
       [syn: blend, flux, mix, conflate, commingle,
       immix, fuse, coalesce, meld, combine, merge]