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 of definitely

• certainly
• surely
• sure
• clearly
• probably
• really

Examples of definitely in a Sentence

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

Recent Examples on the Web

Though hitting free agency was expected, the 30-year-old's performance this season should definitely put him on the radar of any teams in need of depth at catcher. —Shaun McAvoy, MSNBC Newsweek, 22 Nov. 2025

To Poolaw, this is definitely a drink to be shared. —Aly Walansky, Southern Living, 21 Nov. 2025

Major investors, including Bridgewater’s Ray Dalio told CNBC Thursday that the market is definitely in a bubble. —Samantha Subin,chris Eudaily, CNBC, 21 Nov. 2025

Well, Cheney definitely saw a big US role in the world. —Dana Taylor, USA Today, 21 Nov. 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.