definitely

[def-uh-nit-lee]

adverb

1. in a clear and definite manner; unambiguously.

2. unequivocally; positively.

   Synonyms: certainly, absolutely

interjection

1. (used to express complete agreement or strong affirmation).

   Are you starting your diet tomorrow? Definitely!

definitely

/ ˈdɛfɪnɪtlɪ /

adverb

1. in a definite manner

2. (sentence modifier) certainly

   he said he was coming, definitely

1. unquestionably: used to confirm an assumption by a questioner

Word History and Origins

Origin of definitely¹

First recorded in 1575–85; definite + -ly

Synonym Study

See clearly.

Example Sentences

“So I’ve just got to keep working, it’s a day by day thing. But I definitely feel the progress.”

From Los Angeles Times

"That win was definitely a big piece of the puzzle," she says.

From BBC

And we are definitely good for experiencing this singular artist up close.

From Los Angeles Times

There’s definitely never any actual moment in which he was ever scared or anything like that.

From Salon

In terms of the social media messaging, the Republicans definitely have the upper hand.

From BBC

Related Words

• absolutely 
• clearly 
• decidedly 
• doubtless 
• easily 
• finally 
• obviously 
• plainly www.thesaurus.com
• surely 
• undeniably www.thesaurus.com
• unequivocally 
• unquestionably 

When To Use

What does definitely mean?

Definitely is an adverb that usually means certainly or without a doubt. It also has this meaning when it’s used as a single-word response.Definitely is also sometimes used as an adverb to describe an action as clearly defined or precise. When definitely is used as a single word in response to a question or other statement, it is called an interjection or sentence substitute. When used this way, it is very similar to saying certainly or absolutely.Example: I will definitely be there tomorrow—I promise.