certainly

adverb

cer·​tain·​ly ˈsər-tᵊn-lē How to pronounce certainly (audio)
1
: in a manner that is certain : with certainty
2
: it is certain that : assuredly

Examples of certainly in a Sentence

It will certainly rain tomorrow. This year's festival was certainly much better than last year's. I'm certainly going to try. The new version is most certainly easier to use. The snake that bit her was almost certainly poisonous.
Recent Examples on the Web
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And that part of us is certainly one of the most intimate components of what Soundgarden has been since 1984. Andy Greene, Rolling Stone, 5 May 2025 While Golden is just 5-foot-11, 191 pounds, speed certainly kills. Rob Reischel, Forbes.com, 4 May 2025 And, certainly, the president is leaning strongly in that. CBS News, 4 May 2025 Maybe the volcanic energy, and certainly the removal of routine. Read More On: Japan Spas Travel Like this article? Adam Hurly, Robb Report, 4 May 2025 See All Example Sentences for certainly

Word History

First Known Use

14th century, in the meaning defined at sense 1

Time Traveler
The first known use of certainly was in the 14th century

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Cite this Entry

“Certainly.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/certainly. Accessed 11 May. 2025.

Kids Definition

certainly

adverb
cer·​tain·​ly ˈsərt-ᵊn-lē How to pronounce certainly (audio)
1
: in a manner that is certain : for certain
the only event of which anything is certainly known
2
: without doubt : surely
certainly you can do it

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