Dictionary.com
Thesaurus.com

dunno

American  
[duh-noh] / dəˈnoʊ /
Informal.
  1. don't know.

    Who did it? I dunno!


dunno British  
/ də-, dʊ-, dʌˈnəʊ /

contraction

  1. (I) do not know

"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

Etymology

Origin of dunno

First recorded in 1835–45; a phonetic spelling representing the pronunciation of don't know in continuous rapid speech

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

“I used to fight with people. I’d ask someone the time and they’d go ‘I dunno.’

From Los Angeles Times • Jan. 18, 2024

The rest of the world either didn’t participate or spent its social currency on Facebook or Instagram or, I dunno, kickball for grown-ups.

From Slate • Oct. 30, 2023

“Ah dunno, ’cept yuh never mentioned it befo’, ” Georgia replies.

From New York Times • Mar. 7, 2023

She said she could go on for “I dunno, six months, a year maybe,” but “I know that as time passed, I would have less and less energy to give to the job.”

From Washington Post • Feb. 15, 2023

“I dunno, I could’ve done it, but I didn’t. Like I said, things are gonna be different for me now. I’m lookin’ for a change in Jackson.”

From "Mississippi Trial, 1955" by Chris Crowe

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "dunno" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com