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

One thing the Heat definitely can’t do is lose in the margins. —Anthony Chiang, Miami Herald, 21 Apr. 2025

Watching that film with the context of this series definitely helps make Cassian's entire story feel complete. —Devonne Goode, Parents, 21 Apr. 2025

While history is definitely a hallmark of this quaint riverfront community, it is also known for gorgeous state parks and outdoor attractions, a lively arts and culture scene, and excellent local downtown shopping. —Tara Massouleh McCay, Southern Living, 21 Apr. 2025

However, that does not mean either will definitely be at the club in 2025-26. —Simon Johnson, New York Times, 20 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.