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.
“In rolling the dice on such a big transaction, he is undoubtedly taking a risk.”
From The Wall Street Journal • Jun. 9, 2026
Ronaldo in what is definitely, undoubtedly their last World Cup as players.
From The Wall Street Journal • Jun. 8, 2026
"While this journey will undoubtedly be challenging, I've always believed in finding meaning through adversity," she said.
From BBC • Jun. 5, 2026
But another dot-com era name reaching a record will undoubtedly make investors uneasy, and increase the talk of an AI bubble.
From Barron's • May 29, 2026
“These are marvelous, undoubtedly the most delicious cookies I have ever tasted in the entire history of my life,” Quentin told her after a nibble.
From "October Sky" by Homer Hickam
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.
