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.
It’s a startup system that will undoubtedly get better and improve over time.
From The Wall Street Journal ● Jul. 13, 2026
Black people who were enslaved were undoubtedly domiciled here, but the same is not true of temporary visitors.
From Los Angeles Times ● Jul. 12, 2026
Some of it, probably, was warranted or in the spirited mission of liberty, as some will undoubtedly argue, but far from all of it.
From Salon ● Jul. 4, 2026
"Of all the projects I've been able to put together, this is undoubtedly the most complex," said Canitrot, who previously staged shows at France's Eiffel Tower and Notre Dame.
From Barron's ● Jul. 3, 2026
She stood along the side, examining the open gate that led to a wide stream that undoubtedly emptied into the sea or the Avery.
From "Throne of Glass" by Sarah J. Maas
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.
