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Definitions

without doubt

ADJECTIVE
without question
Synonyms
WEAK
certain doubtless incontestable indisputable irrefutable sure unmistakable unquestionable
ADVERB
definitely
Synonyms
STRONGEST
absolutely clearly decidedly doubtless easily finally obviously plainly surely undeniably unequivocally unquestionably
WEAK
beyond any doubt categorically doubtlessly explicitly expressly far and away indubitably no ifs ands or buts about it positively specifically unmistakably without fail without question
Antonyms
STRONGEST
doubtedly doubtfully dubiously questionable questionably uncertain
WEAK
indefinitely
ADVERB
doubtless
Synonyms
STRONGEST
absolutely clearly presumably surely undoubtedly unequivocally unquestionably
WEAK
apparently assuredly easily for sure indisputably no ifs ands or buts of course ostensibly positively precisely probably seemingly supposedly truly
Antonyms
STRONGEST
doubtfully indefinite questionably
WEAK
doubted doubtedly dubious improbably questionable uncertain unlikely
ADVERB
far and away
Synonyms
WEAK
by a great deal by far far and wide to the highest degree
ADVERB
indubitably
Synonyms
WEAK
certainly definitely for sure indeed no question of course positively surely undoubtedly
ADVERB
obviously
Synonyms
STRONGEST
apparently certainly clearly definitely evidently noticeably plainly seemingly surely undoubtedly visibly
WEAK
distinctly incontestably of course openly undeniably unquestionably
Antonyms
STRONGEST
doubtfully dubiously equivocally indefinitely questionably uncertain vaguely
ADVERB
undoubtedly
Synonyms
STRONGEST
assuredly definitely doubtless easily indeed really surely truly undeniably unquestionably
WEAK
beyond question beyond shadow of a doubt of course unmistakably well
Antonyms
STRONGEST
doubtedly doubtfully dubiously questionably uncertain
WEAK
indefinite

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.

Former Premier League assistant referee Darren Cann said it was "without doubt the correct decision".

From BBC • Jan. 24, 2026

"The way he played Bumrah, he without doubt played with the most control," former England captain Alastair Cook told Test Match Special.

From BBC • Jun. 21, 2025

“I think I can speak for all of us, we are lifting you up in prayer right now believing without doubt for your total healing!”

From Los Angeles Times • May 7, 2025

And, without doubt, it raised public awareness of the issues facing Ethiopia in the 1980s.

From Salon • Dec. 2, 2024

The figure before them was indeed impressive, without doubt the biggest human any of them had ever seen.

From "Artemis Fowl" by Eoin Colfer