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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Otherwise, this unit will cause major issues for a team that has a lot going for it and could certainly make a run to October. Sahadev Sharma, New York Times, 11 Apr. 2025 While Robby and the rest of the emergency room day shift team has certainly earned time off, that leaves the rest of us with a Pitt-sized hole on our TVs (and in our hearts). Annabel Gutterman, Time, 11 Apr. 2025 Whether this hints at a more long-term issue or is merely a minor bump in the road will probably only become clear next season when, almost certainly, Liverpool defend their league title. Gregg Evans, New York Times, 11 Apr. 2025 This is certainly a prominent need for the future. Jeff Zrebiec, New York Times, 11 Apr. 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 23 Apr. 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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