doubt

1 of 2

verb

doubted; doubting; doubts

transitive verb

1
: to call into question the truth of : to be uncertain or in doubt about
He doubts everyone's word.
2
a
: to lack confidence in : distrust
… find myself doubting him even when I know that he is honest …H. L. Mencken
b
: to consider unlikely
I doubt if I can go.
3
archaic
a
: fear
… I doubt I have been beguiled!Sir Walter Scott
b
doubtable adjective
doubter noun
doubtingly adverb

doubt

2 of 2

noun

plural doubts
1
a
: a lack of confidence : distrust
has doubts about his abilities
b
: an inclination not to believe or accept
a claim met with doubt
2
a
: uncertainty of belief or opinion that often interferes with decision-making
b
: a deliberate suspension of judgment
3
: a state of affairs giving rise to uncertainty, hesitation, or suspense
The outcome is still in doubt.
Phrases
no doubt
Choose the Right Synonym for doubt

uncertainty, doubt, dubiety, skepticism, suspicion, mistrust mean lack of sureness about someone or something.

uncertainty may range from a falling short of certainty to an almost complete lack of conviction or knowledge especially about an outcome or result.

assumed the role of manager without hesitation or uncertainty

doubt suggests both uncertainty and inability to make a decision.

plagued by doubts as to what to do

dubiety stresses a wavering between conclusions.

felt some dubiety about its practicality

skepticism implies unwillingness to believe without conclusive evidence.

an economic forecast greeted with skepticism

suspicion stresses lack of faith in the truth, reality, fairness, or reliability of something or someone.

regarded the stranger with suspicion

mistrust implies a genuine doubt based upon suspicion.

had a great mistrust of doctors

Examples of doubt in a Sentence

Verb I have always doubted the existence of life on other planets. No one doubts that the mission will be a success. I seriously doubt my parents will let me go. “Do you think you can come tonight?” “I doubt it.” She doubted his ability to succeed. He said he could do it, but I couldn't help doubting him. Noun I still have moments of doubt. There can be little doubt that smoking is bad for your health. I had a nagging doubt in the back of my mind.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Verb
When combined, these missteps compound risk, exposing systemic disorganization that makes investors doubt the team’s ability to scale. Kirill Gurskiy, Forbes.com, 21 Aug. 2025 Kirk faces a crisis of conscience and doubts his leadership skills when Spock intervenes and slowly guides him back to baseline where his command skills begin to be forged under fire. Jeff Spry, Space.com, 20 Aug. 2025
Noun
However, there is no doubt that the bigger names attract more viewers and larger paychecks. Merlisa Lawrence Corbett, Forbes.com, 22 Aug. 2025 Without a doubt there are people who would pay serious money to see Jeffrey Katzenberg hanging out and trudging through the sand and dirt at Burning Man. Dominic Patten, Deadline, 22 Aug. 2025 See All Example Sentences for doubt

Word History

Etymology

Verb and Noun

Middle English douten, from Anglo-French duter, douter, from Latin dubitare to be in doubt; akin to Latin dubius dubious

First Known Use

Verb

13th century, in the meaning defined at transitive sense 3a

Noun

13th century, in the meaning defined at sense 2a

Time Traveler
The first known use of doubt was in the 13th century

Cite this Entry

“Doubt.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/doubt. Accessed 27 Aug. 2025.

Kids Definition

doubt

1 of 2 verb
1
: to be uncertain about
doubts her sincerity
2
: to lack confidence in
doubted his own abilities
3
: to consider unlikely
doubt if I can go
doubtable adjective
doubter noun
doubtingly adverb

doubt

2 of 2 noun
1
: uncertainty of belief or opinion
2
: the state of being uncertain
the outcome is in doubt
3
a
: a lack of confidence
b
: an inclination not to believe or accept

More from Merriam-Webster on doubt

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