• synonyms


Pronunciation Spelling.
  1. don't know: Who did it? I dunno!
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Origin of dunno

First recorded in 1835–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for dunno

Contemporary Examples

Historical Examples

  • I dunno as wimmin horse doctors is very common, but I dunno why not.

  • I get a horse with somethin' the matter of his foot, and I dunno what.

  • I dunno how you're goin' to git along with men-folks, if ye offer 'em the whip-hand.

    Tiverton Tales

    Alice Brown

  • "Why, I dunno's there's anything in the way of it," she said, soberly.

    Meadow Grass

    Alice Brown

  • I've studied a good deal over her, an' I dunno's I've quite got to the bottom of her yit.

    Meadow Grass

    Alice Brown

British Dictionary definitions for dunno


contraction of
  1. (I) do not know
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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 dunno


colloquial for "(I) don't know," first attested 1842 in American English.

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Online Etymology Dictionary, © 2010 Douglas Harper