definitely

adverb

def·​i·​nite·​ly ˈde-fə-nit-lē How to pronounce definitely (audio)
ˈdef-nət-
Synonyms of definitelynext
1
: in a definite way : in a way free of all ambiguity, uncertainty, or obscurity
I will definitely be there.
He's very smart and very funny and is definitely a practical actor. He comes to work to get his job done and to make the best movie possible …Anna Kendrick
Omaha is definitely not hip; green-haired XML programmers do not glide past gourmet coffee emporiums on Razor scooters.Adam Rogers
2
a
used in speech as a forceful way of expressing agreement or saying "yes"
"Do you think they'll win?" "Definitely!"
b
used in speech in the phrase definitely not as a forceful way of expressing disagreement or saying "no"
"Do you agree with him?" "Definitely not!"

Examples of definitely in a Sentence

that is definitely the kind of dog we're looking to adopt
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.
The strike zone was definitely a little bit bigger. Jeff Sanders, San Diego Union-Tribune, 18 Mar. 2026 It was definitely held up, and so … everybody’s been running around this city trying to figure out what’s going on. Shelley Nelson, Twin Cities, 18 Mar. 2026 This definitely does not look like Kevin Hart. Phaedra Trethan, USA Today, 18 Mar. 2026 Malkovich’s Chris is an eccentric main character—probably brilliant, definitely frustrating, with a sharp wit and a lot on his mind. Rebecca Ford, Vanity Fair, 18 Mar. 2026 See All Example Sentences for definitely

Word History

Etymology

definite + -ly entry 2

First Known Use

1574, in the meaning defined at sense 1

Time Traveler
The first known use of definitely was in 1574

Cite this Entry

“Definitely.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/definitely. Accessed 20 Mar. 2026.

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