definitely

adverb

def·​i·​nite·​ly ˈde-fə-nit-lē How to pronounce definitely (audio)
ˈdef-nət-
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 vibes are definitely compromised around Anfield. Steven Louis Goldstein, New York Times, 25 Oct. 2025 Before donating, ensure there's no ash or wax in the pumpkin and definitely discard any pumpkins that have been decorated with paint, glitter, glue, etc. Patricia Shannon, Southern Living, 24 Oct. 2025 Some other state, possibly culminating in a singularity but definitely not an inflationary state itself, must have preceded it. Big Think, 24 Oct. 2025 At this point, the ball is definitely in the Mets' court. Jackson Roberts, MSNBC Newsweek, 24 Oct. 2025 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 29 Oct. 2025.

More from Merriam-Webster on definitely

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!