dubious
Americanadjective
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doubtful; marked by or occasioning doubt.
a dubious reply.
-
of doubtful quality or propriety; questionable.
a dubious compliment; a dubious transaction.
-
of uncertain outcome.
in dubious battle.
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wavering or hesitating in opinion; inclined to doubt.
adjective
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marked by or causing doubt
a dubious reply
-
unsettled in mind; uncertain; doubtful
-
of doubtful quality; untrustworthy
a dubious reputation
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not certain in outcome
Related Words
See doubtful.
Other Word Forms
- dubiously adverb
- dubiousness noun
- superdubious adjective
- superdubiously adverb
- superdubiousness noun
- undubious adjective
- undubiously adverb
- undubiousness noun
Etymology
Origin of dubious
First recorded in 1540–50; from Latin dubius; doubt ( def. )
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.
The part where the laser guides the VSELs around Scott’s body is perhaps the most dubious of a procedure littered with doubt.
From Slate • Mar. 30, 2026
In rare diseases and advanced cancer, such demands can be impractical, ethically dubious and less informative than carefully analyzed real-world evidence.
From The Wall Street Journal • Mar. 17, 2026
"Some of these tools are not ethically dubious at all. They're trained by people that are using their own work," she added.
From Barron's • Mar. 10, 2026
About three decades ago, an accountant profited from dubious deductions he put on the tax returns of an unsuspecting client.
From MarketWatch • Feb. 27, 2026
There were some climbers of very dubious ability on a commercial expedition led by an Englishman with undistinguished Himalayan credentials.
From "Into Thin Air" by Jon Krakauer
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
