doubtless

1 of 2

adverb

doubt·​less ˈdau̇t-ləs How to pronounce doubtless (audio)
Synonyms of doubtlessnext
1
: without doubt
2

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
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Adverb
It will doubtless be held up as a sign of the family’s ambition, and their desire to move very far away from two consecutive 17th-place Premier League finishes. Chris Weatherspoon, New York Times, 25 June 2026 But the rumours had spread, and doubtless this gave him pause. Literary Hub, 28 May 2026
Adjective
As a result, mathematical truths do not make up a unified whole of equally indubitable truths; instead, their status as knowledge varies gradually from doubtless facts to increasingly uncertain hypotheses. Quanta Magazine, 18 May 2026 Lastly, while there is doubtless a tradeoff between construction costs and operations, a smooth operation at the big airport this coming summer — the busiest travel season — sure as heck needs to be a priority. The Editorial Board, Chicago Tribune, 4 Mar. 2026 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

Browse Nearby Words

Cite this Entry

“Doubtless.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/doubtless. Accessed 5 Jul. 2026.

Kids Definition

doubtless

1 of 2 adverb
doubt·​less ˈdau̇t-ləs How to pronounce doubtless (audio)

doubtless

2 of 2 adjective
: free from doubt : certain
doubtlessly adverb

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