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• don't-know
  don't-know

  noun

  a person who has no opinion or is undecided, as in answering an item on a public-opinion poll.
• don't know
  don't know

  noun

  a person who has not reached a definite opinion on a subject, esp as a response to a questionnaire

don't-know

American  

[dohnt-noh] / ˈdoʊntˈnoʊ /

noun

1. a person who has no opinion or is undecided, as in answering an item on a public-opinion poll.

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don't know British  

noun

1. a person who has not reached a definite opinion on a subject, esp as a response to a questionnaire

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Etymology

Origin of don't-know

First recorded in 1885–90

Example Sentences

See Examples For:

don't know

“I don’t know if the rewards of owning a home match the risk profile of today’s economy,” said Beeler, who is now 30.

From MarketWatch ● Sep. 16, 2026

I don’t know where this fracture will lead, other than that it won’t be anywhere good.

From Slate ● Sep. 16, 2026

“We don’t know how long we’re going to stay here, so we didn’t want to lock up money in a house,” he said.

From MarketWatch ● Sep. 16, 2026

“We went through the Great Recession. We went through Covid. But I never before had that feeling that I don’t know how to price things,” said Co-Owner Valerie Jensen.

From The Wall Street Journal ● Sep. 15, 2026

"I don't know a thing about combat. That's my master Don Quixote's business, not mine."

From "Adventures of Don Quixote" by Argentina Palacios