definitely
Americanadverb
-
in a clear and definite manner; unambiguously.
-
unequivocally; positively.
- Synonyms:
- certainly, absolutely
interjection
adverb
-
in a definite manner
-
(sentence modifier) certainly
he said he was coming, definitely
Usage
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.
Related Words
See clearly.
Etymology
Origin of definitely
Compare meaning
How does definitely compare to similar and commonly confused words? Explore the most common comparisons:
Explanation
Use definitely to describe something you don’t have any doubt about. If you are certain you're going to see your friend's band play, you can assure him that you'll definitely be there. The adverb definitely is used to emphasize the certainty of whatever word it modifies. If you are sure you want apple pie, you could say you definitely want it. The base word definite can also mean "a certain limit," like the definite size a shelf must have to be. You wouldn't say "the carpenter definitely cuts the wood," to describe the exactness of the work; use precisely instead. AND, yes, definitely definitely has an e before the ly!
Vocabulary lists containing definitely
Commonly Misspelled Words, List 2
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Commonly Confused Words, List 2
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Wiping tears from his eyes as he slowly made his way through the intergenerational crowd, he recognized almost everyone in attendance — if not by name, then definitely by address.
From Los Angeles Times • Apr. 16, 2026
Since I think soy sauce is definitely the most fundamental of Washoku’s basic seasonings, I believe we must preserve the traditional method for the next generation.
From The Wall Street Journal • Apr. 15, 2026
There will be no silverware and the Dutchman has already said failing to have Champions League football next season would mean this would "definitely not be an acceptable season".
From BBC • Apr. 14, 2026
It was definitely more than a hot flash.
From Los Angeles Times • Apr. 14, 2026
“But you’re right. I definitely couldn’t do that, even if I had all day.”
From "Boy 2.0" by Tracey Baptiste
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
