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

Vanuatu definitely plays better on a modern-day viewing when contrasted against how kumbaya new-school seasons have been (at least until Survivor 46). —Dalton Ross, EW.com, 15 May 2025

Me, my life, elements of my music and most definitely the world. —Steven J. Horowitz, Variety, 15 May 2025

Her expert taste expands far beyond that, though — and that’s definitely evident in her fashionable Skechers collection. —Jamie Allison Sanders, People.com, 15 May 2025

And definitely don’t sleep on Patrick Cantlay, Russell Henley, or Tommy Fleetwood—all steady performers this season who won’t miss their chance to shine if the bigger stars stumble. —Mike Dojc, Forbes.com, 14 May 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.