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.

Doubtless it will rear its head again at some point.

From BBC • Apr. 21, 2026

Doubtless 2026 will produce its own set of neologisms.

From The Wall Street Journal • Dec. 15, 2025

Doubtless, there is waste, fraud and abuse that could be thoughtfully and deliberately carved out.

From Los Angeles Times • Mar. 16, 2025

Doubtless this review appears in a newspaper chock full of heartbreaking reports of life on our suspended jewel.

From Seattle Times • Dec. 11, 2023

Doubtless he meant to sound threatening, but that absurd wisp of a mustache ruined the effect.

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

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "doubtless" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com