The Collaborative International Dictionary of English v.0.48:

Blot \Blot\, v. i.
   To take a blot; as, this paper blots easily.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Blot \Blot\, n. [Cf. Icel. blettr, Dan. plet.]
   1. A spot or stain, as of ink on paper; a blur. "Inky blots
      and rotten parchment bonds." --Shak.
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   2. An obliteration of something written or printed; an
      erasure. --Dryden.
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   3. A spot on reputation; a stain; a disgrace; a reproach; a
      blemish.
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            This deadly blot in thy digressing son. --Shak.
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The Collaborative International Dictionary of English v.0.48:

Blot \Blot\, v. t. [imp. & p. p. Blotted; p. pr. & vb. n.
   Blotting.] [Cf. Dan. plette. See 3d Blot.]
   [1913 Webster]
   1. To spot, stain, or bespatter, as with ink.
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            The brief was writ and blotted all with gore.
                                                  --Gascoigne.
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   2. To impair; to damage; to mar; to soil.
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            It blots thy beauty, as frosts do bite the meads.
                                                  --Shak.
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   3. To stain with infamy; to disgrace.
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            Blot not thy innocence with guiltless blood. --Rowe.
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   4. To obliterate, as writing with ink; to cancel; to efface;
      -- generally with out; as, to blot out a word or a
      sentence. Often figuratively; as, to blot out offenses.
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            One act like this blots out a thousand crimes.
                                                  --Dryden.
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   5. To obscure; to eclipse; to shadow.
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            He sung how earth blots the moon's gilded wane.
                                                  --Cowley.
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   6. To dry, as writing, with blotting paper.
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   Syn: To obliterate; expunge; erase; efface; cancel; tarnish;
        disgrace; blur; sully; smear; smutch.
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The Collaborative International Dictionary of English v.0.48:

Blot \Blot\, n. [Cf. Dan. blot bare, naked, Sw. blott, d. bloot,
   G. bloss, and perh. E. bloat.]
   1. (Backgammon)
      (a) An exposure of a single man to be taken up.
      (b) A single man left on a point, exposed to be taken up.
          [1913 Webster]

                He is too great a master of his art to make a
                blot which may be so easily hit.  --Dryden.
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   2. A weak point; a failing; an exposed point or mark.
      [1913 Webster]

WordNet (r) 3.0 (2006):

blot
    n 1: a blemish made by dirt; "he had a smudge on his cheek"
         [syn: smudge, spot, blot, daub, smear, smirch,
         slur]
    2: an act that brings discredit to the person who does it; "he
       made a huge blot on his copybook" [syn: blot, smear,
       smirch, spot, stain]
    v 1: dry (ink) with blotting paper
    2: make a spot or mark onto; "The wine spotted the tablecloth"
       [syn: spot, fleck, blob, blot]