undoubtedly
Americanadverb
adverb
-
certainly or definitely; unquestionably
he is undoubtedly talented
-
(sentence modifier) without doubt; certainly or indisputably
undoubtedly there will be changes
Etymology
Origin of undoubtedly
First recorded in 1500–50; undoubted ( def. ) + -ly ( def. )
Explanation
Undoubtedly means certainly. If you are undoubtedly beautiful, then everyone agrees you are attractive. No one could think otherwise. There are a lot of things in life that people doubt. However, when you're sure of something or feel strongly about it, this is a handy word. A beautiful spring day is undoubtedly wonderful. Dogs undoubtedly love to chase squirrels. Adults undoubtedly love to drink coffee in the morning, and kids undoubtedly love to get a day off from school. You are undoubtedly aware that this is a long explanation for something as simple as this word.
Vocabulary lists containing undoubtedly
“About Edward Jenner” from the Jenner Institute
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"Tinker v. Des Moines": Excerpts from Justice Black's Dissenting Opinion
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Lesson 21
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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.
Metrics can include performance data that is undoubtedly relevant, such as sales results.
From The Wall Street Journal ● Aug. 20, 2026
The process was undoubtedly accelerated by Hodgkinson's rise to Olympic gold, and further medals at Paris 2024 for team-mates Hunter Bell and Lewis Davey.
From BBC ● Aug. 10, 2026
The Chargers’ offense will undoubtedly be different under McDaniel — Herbert’s new shotgun stance is proof of that.
From Los Angeles Times ● Aug. 9, 2026
Other teams, like the Milwaukee Brewers and Tampa Bay Rays, undoubtedly could have sent the Tigers a package that surpassed what the Dodgers offered.
From The Wall Street Journal ● Aug. 2, 2026
Yet scientists today could undoubtedly, if they wished, fulfill for many species that part of the definition of domestication that specifies the control of breeding and food supply.
From "Guns, Germs, and Steel: The Fates of Human Societies" by Jared M. Diamond
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.
