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Definitions

doubt

[dout] / daʊt /
NOUN
lack of faith, conviction; questioning
Synonyms
STRONGEST
ambiguity apprehension confusion difficulty disbelief distrust fear hesitation misgiving mistrust problem qualm reluctance skepticism suspense suspicion uncertainty
STRONG
agnosticism demurral diffidence dilemma discredit disquiet dubiety dubiousness faithlessness faltering hesitancy incertitude incredulity indecision irresolution perplexity quandary rejection scruple vacillation wavering
WEAK
lack of confidence
Antonyms
STRONGEST
belief calm calmness certainty clarity confidence definiteness ease faith knowledge sureness trust
STRONG
solution
WEAK
dependence reliance
VERB
lack confidence in; question
Synonyms
STRONGEST
distrust hesitate impugn suspect
STRONG
challenge demur disbelieve discredit dispute fear fluctuate imagine insinuate misgive mistrust query scruple surmise vacillate waver
WEAK
be apprehensive of be curious be dubious be in a quandary be puzzled be uncertain be undetermined call in question give no credence harbor suspicion have qualms misdoubt not buy read differently shilly-shally skepticize smell a rat take dim view of wonder at
Antonyms
STRONGEST
trust
STRONG
agree answer believe go along remain stay
WEAK
be certain not question rely

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.

Michigan’s pummeling of fellow No. 1 seed Arizona on Saturday night, 91-73, proved one thing beyond a doubt.

From The Wall Street Journal • Apr. 5, 2026

The announcement follows a period of uncertainty, with the future of the island's helicopter emergency medical service in doubt last year.

From BBC • Apr. 5, 2026

So yeah, giving him control of the sun is probably one of the worst such ideas anyone could possibly come up with, though I don’t doubt he’s capable of even more.

From Salon • Apr. 4, 2026

"If you sow doubt about your commitment every day, you drain it of its substance."

From Barron's • Apr. 3, 2026

As we came to a stop at the end of the drive, I looked right at Mama and told her, “I highly doubt that.”

From "Ida B" by Katherine Hannigan

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.