definitely

adverb

def·​i·​nite·​ly ˈde-fə-nit-lē 

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!"

Synonyms

• all right
• alright
• assuredly
• certainly
• clearly
• doubtless
• easily
• forsooth
• hands down
• inarguably
• incontestably
• incontrovertibly
• indeed
• indisputably
• plainly
• really
• so
• sure
• surely
• truly
• unarguably
• undeniably
• undoubtedly
• unquestionably

Examples of definitely in a Sentence

that is definitely the kind of dog we're looking to adopt

Recent Examples on the Web

Intelligent zombies are definitely not a positive development. —Sara Netzley, EW.com, 14 Apr. 2025

This floral midi dress will definitely be in my style rotation, thanks to a V-neckline, fabric belt, and ruffled high-low hemline. —Jamie Allison Sanders, People.com, 13 Apr. 2025

There are different characters that come through the ketamine, and one is definitely Emma. —Lisa De Los Reyes, HollywoodReporter, 13 Apr. 2025

The Warriors play the Clippers, so the loser of that game likely — but not definitely — goes to the play-in. —Tim Reynolds, Chicago Tribune, 13 Apr. 2025

Word History

Etymology

definite + -ly entry 2

First Known Use

1574, in the meaning defined at sense 1

Rhymes for definitely

• indefinitely

Video

How to Remember the Spelling of 'Definitely'

A definitive answer.