doubtless

1 of 2

adverb

doubt·less ˈdau̇t-ləs

Synonyms of doubtless

: without doubt

: probably

doubtless

2 of 2

adjective

: free from doubt : certain

doubtlessly adverb

doubtlessness noun

Examples of doubtless in a Sentence

Adverb she is doubtless the one and only girl for me doubtless you have heard this story before, but I'll tell it anyway Adjective another one of his doubtless predictions that will never come true

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.

Adverb

But the rumours had spread, and doubtless this gave him pause. — Literary Hub, 28 May 2026 Savings here and there are doubtless feasible. — Editorial, Boston Herald, 17 Apr. 2026

Adjective

And the all-boffo, all-the-time production is exhausting (which is doubtless why the rare quiet moments stand out). — Bill Goodykoontz, The Arizona Republic, 29 Nov. 2022 Even moderately keen cornering produces body roll and would bring doubtless admonition from the rear seats. — Mike Duff, Car and Driver, 18 Aug. 2023 See All Example Sentences for doubtless

Word History

First Known Use

Adverb

14th century, in the meaning defined at sense 1

Adjective

15th century, in the meaning defined above

Time Traveler

The first known use of doubtless was in the 14th century

See more words from the same century

Cite this Entry

Style

“Doubtless.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/doubtless. Accessed 7 Jul. 2026.

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Kids Definition

doubtless

1 of 2 adverb

doubt·less ˈdau̇t-ləs

: certainly

: probably

doubtless

2 of 2 adjective

: free from doubt : certain

doubtlessly adverb

doubtless

adverb

adjective

Synonyms of doubtless

Examples of doubtless in a Sentence

Word History

Browse Nearby Words

Cite this Entry

Kids Definition

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