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See more synonyms for know-nothing on Thesaurus.com
  1. an ignorant or totally uninformed person; ignoramus.
  2. an agnostic.
  3. (initial capital letters) U.S. History. a member of a political party (American party or Know-Nothing party) prominent from 1853 to 1856, whose aim was to keep control of the government in the hands of native-born citizens: so called because members originally professed ignorance of the party's activities.
  4. a person whose anti-intellectualism, xenophobia, and other political attitudes recall the Know-Nothings.
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  1. grossly ignorant; totally uninformed.
  2. agnostic.
  3. (initial capital letters) of or relating to the Know-Nothings.
  4. of or relating to a political know-nothing.
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Origin of know-nothing

First recorded in 1815–25
Related formsknow-noth·ing·ism, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for know-nothing

unschooled, illiterate, ignorant, fool, dunce, idiot, blockhead, imbecile, moron, dimwit, empty-headed, ignoramus, uncultivated, uncultured, unlearned, unrefined, untaught, benighted, uninstructed, know-nothing

Examples from the Web for know-nothing

Contemporary Examples of know-nothing

Historical Examples of know-nothing

British Dictionary definitions for know-nothing


  1. informal, derogatory an ignorant person
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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 know-nothing


"ignoramus," 1827, from know + nothing. As a U.S. nativist political party, active 1853-56, the name refers to the secret society at the core of the party, about which members were instructed to answer, if asked about it, that they "know nothing." The party eventually merged into the Republican Party.

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Online Etymology Dictionary, © 2010 Douglas Harper