See more synonyms for blotch on
  1. a large, irregular spot or blot.
  2. Plant Pathology.
    1. a diseased, discolored spot or area on a plant.
    2. a disease so characterized, usually accompanied by cankers and lesions.
  3. a skin eruption; blemish.
verb (used with object)
  1. to mark with blotches; blot, spot, or blur: The floor of the forest was blotched with cool, dark moss.
  1. Textiles. of or relating to blotch printing, or to the colored ground produced by this process.

Origin of blotch

1595–1605; perhaps blend of blot1 + botch2

Synonyms for blotch

See more synonyms for on Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for blotch

blot, blemish, eruption, spot, patch, splash, breakout, stigma, stain, mark, acne

Examples from the Web for blotch

Historical Examples of blotch

British Dictionary definitions for blotch


  1. an irregular spot or discoloration, esp a dark and relatively large one such as an ink stain
  1. to become or cause to become marked by such discoloration
  2. (intr) (of a pen or ink) to write or flow unevenly in blotches

Word Origin for blotch

C17: probably from botch, influenced by blot 1
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 blotch

c.1600, perhaps a blend of blot and botch or patch.

Online Etymology Dictionary, © 2010 Douglas Harper

blotch in Science


  1. Any of several plant diseases caused by fungi and resulting in brown or black dead areas on leaves or fruit.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.