from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A spot or a stain caused by a discoloring substance: a blot of paint.
  • n. A stain on one's character or reputation; a disgrace. See Synonyms at stain.
  • n. The Northern, Southern, or Western blot analyses.
  • transitive v. To spot or stain, as with a discoloring substance.
  • transitive v. To bring moral disgrace to.
  • transitive v. To obliterate (writing, for example).
  • transitive v. To make obscure; hide: clouds blotting out the moon.
  • transitive v. To destroy utterly; annihilate: War blotted out their traditional way of life.
  • transitive v. To soak up or dry with absorbent material.
  • intransitive v. To spill or spread in a spot or stain.
  • intransitive v. To become blotted, soaked up, or absorbed.
  • n. Games An exposed piece in backgammon.
  • n. Archaic A weak point.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A blemish, spot or stain made by a coloured substance.
  • n. A stain on someone's reputation or character; a disgrace.
  • n. The Southern blot analysis (and derived Northern and Western) analytical techniques.
  • n. an exposed piece in backgammon.
  • v. to cause a blot (on something) by spilling a coloured substance.
  • v. to soak up, or absorb liquid.
  • v. to hide, obscure or obliterate something.

from the GNU version of the Collaborative International Dictionary of English

  • n. A spot or stain, as of ink on paper; a blur.
  • n. An obliteration of something written or printed; an erasure.
  • n. A spot on reputation; a stain; a disgrace; a reproach; a blemish.
  • n.
  • n. An exposure of a single man to be taken up.
  • n. A single man left on a point, exposed to be taken up.
  • n. A weak point; a failing; an exposed point or mark.
  • intransitive v. To take a blot.
  • transitive v. To spot, stain, or bespatter, as with ink.
  • transitive v. To impair; to damage; to mar; to soil.
  • transitive v. To stain with infamy; to disgrace.
  • transitive v. To obliterate, as writing with ink; to cancel; to efface; -- generally with out. Often figuratively.
  • transitive v. To obscure; to eclipse; to shadow.
  • transitive v. To dry, as writing, with blotting paper.

from The Century Dictionary and Cyclopedia

  • To spot, stain, or bespatter, as with ink, mud, or any discoloring matter.
  • Figuratively, to stain as with disgrace or infamy; tarnish; disgrace; disfigure.
  • To obliterate so as to render invisible or not distinguishable, as writing or letters with ink: generally with out: as, to blot out a word or a sentence.
  • Hence To efface; cause to be unseen or forgotten; destroy; annihilate: followed by out: as, to blot out a crime, or the remembrance of anything.
  • To darken or obscure; eclipse.
  • To dry by means of blotting-paper or the like.
  • To obliterate something written.
  • To become blotted or stained: as, this paper blots easily.
  • n. A spot or stain, as of ink on paper; a blur; a disfiguring stain or mark: as, “one universal blot,”
  • n. A scoring out; an erasure or obliteration, as in a writing.
  • n. A spot upon character or reputation; a moral stain; a disgrace; a reproach; a blemish.
  • n. Imputed disgrace or stain; defamation: as, to cast a blot upon one's character.
  • n. In backgammon: A single exposed piece which is liable to be forfeited or taken up.
  • n. The exposure of a piece in this way.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • v. dry (ink) with blotting paper
  • n. a blemish made by dirt
  • v. make a spot or mark onto
  • n. an act that brings discredit to the person who does it


from The American Heritage® Dictionary of the English Language, 4th Edition

Middle English.
Possibly from Low German blat, naked, unprotected.

from Wiktionary, Creative Commons Attribution/Share-Alike License

Originally "blemish," perhaps from Old Norse blettr, or from Old French bloche ("clod of earth")


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    Out Damn Blot: A Letter to Colin Powell


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