Thesaurus.com
Dictionary.com
Definitions

doubtless

[dout-lis] / ˈdaʊt lɪs /
ADVERB
certainly; most likely
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 without doubt
Antonyms
STRONGEST
doubtfully indefinite questionably
WEAK
doubted doubtedly dubious improbably questionable uncertain unlikely

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.

Lorne Michaels doubtless has her on speed dial.

From Los Angeles Times • Mar. 23, 2026

South Korean missile defenses now operational in the United Arab Emirates have doubtless attracted attention in both Iran and North Korea.

From The Wall Street Journal • Mar. 17, 2026

However, some will doubtless feel that they have enough credit in the bank from England's year-long winning streak to survive a cull.

From BBC • Mar. 3, 2026

But he will doubtless hope to continue a post-season in which refereeing decisions have largely been uncontroversial -- with one major exception.

From Barron's • Feb. 3, 2026

Stannis would be camped with his lords on the south bank of the river, doubtless seething with impatience and wondering what Ser Imry had done with his fleet.

From "A Clash of Kings" by George R.R. Martin