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blot1

[blot]
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noun
  1. a spot or stain, especially of ink on paper.
  2. a blemish on a person's character or reputation: He had been haunted by a blot on his past.
  3. Archaic. an erasure or obliteration, as in a writing.
verb (used with object), blot·ted, blot·ting.
  1. to spot, stain, soil, or the like.
  2. to darken; make dim; obscure or eclipse (usually followed by out): We watched as the moon blotted out the sun.
  3. to dry with absorbent paper or the like: to blot the wet pane.
  4. to remove with absorbent paper or the like.
verb (used without object), blot·ted, blot·ting.
  1. to make a blot; spread ink, dye, etc., in a stain: The more slowly I write, the more this pen blots.
  2. to become blotted or stained: This paper blots too easily.
  3. Chemistry. to transfer an array of separated components of a mixture to a chemically treated paper for analysis.Compare gel, gel electrophoresis.
Verb Phrases
  1. blot out,
    1. to make indistinguishable; obliterate: to blot out a name from the record.
    2. to wipe out completely; destroy: Whole cities were blotted out by bombs.

Origin of blot1

1275–1325; (noun) Middle English blotte, akin to Old Norse blettr blot, spot, stain; (v.) late Middle English blotten, derivative of the noun
Related formsblot·less, adjectiveblot·ting·ly, adverbblot·ty, adjectiveun·blot·ted, adjective

Synonyms

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1. blotch, ink stain. 2. stain, taint, dishonor, disgrace, spot. 4. sully, disfigure. 5. obliterate, efface, erase, expunge. 7. absorb.

blot2

[blot]
noun
  1. Backgammon. an exposed piece liable to be taken or forfeited.
  2. Archaic. an exposed or weak point, as in an argument or course of action.

Origin of blot2

1590–1600; < Low German blat, akin to bloot bare, exposed, unprotected; cognate with Dutch bloot, German bloss bare
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for blot

blot1

noun
  1. a stain or spot of ink, paint, dirt, etc
  2. something that spoils or detracts from the beauty or worth of something
  3. a blemish or stain on one's character or reputation
verb blots, blotting or blotted
  1. (of ink, dye, etc) to form spots or blobs on (a material) or (of a person) to cause such spots or blobs to form on (a material)
  2. blot one's copybook informal to spoil one's reputation by making a mistake, offending against social customs, etc
  3. (intr) to stain or become stained or spotted
  4. (tr) to cause a blemish in or on; disgrace
  5. to soak up (excess ink, etc) by using blotting paper or some other absorbent material
  6. (of blotting paper or some other absorbent material) to absorb (excess ink, etc)
  7. (tr often foll by out)
    1. to darken or hide completely; obscure; obliterate
    2. to destroy; annihilate

Word Origin

C14: probably of Germanic origin; compare Middle Dutch bluyster blister

blot2

noun
  1. backgammon a man exposed by being placed alone on a point and therefore able to be taken by the other player
  2. archaic a weak spot

Word Origin

C16: perhaps from Middle Dutch bloot poor
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for blot

n.

late 14c., originally "blemish," perhaps from Old Norse blettr "blot, stain," or from Old French blot, variant of bloc "block," or blestre "blister, lump, clump of earth."

v.

early 15c., "to make blots;" mid-15c. "to blot out, obliterate" (words), from blot (n.). Related: Blotted; blotting.

Online Etymology Dictionary, © 2010 Douglas Harper

blot in Medicine

blot

(blŏt)
n.
  1. The Northern, Southern, or Western blot analyses.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.