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
Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!
"Tinker v. Des Moines": Excerpts from Justice Black's Dissenting Opinion
Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!
Lesson 21
Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!
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.
Others will undoubtedly find it infuriating, proof of a rapidly eroding culture in which art can be defined as good simply because someone likes it.
From Los Angeles Times ● Sep. 2, 2026
"It's undoubtedly better than before. Before, this oil wasn't being extracted; if no one extracts it, no one pays royalties, and no one profits from it," he said.
From Barron's ● Aug. 30, 2026
Dahlia Lithwick unpacks the high court’s ruling and how it will undoubtedly lead to mass confusion.
From Slate ● Aug. 27, 2026
"There is undoubtedly a level of intolerance creeping in which has become included in protest."
From BBC ● Aug. 17, 2026
Unless you have been very, very lucky, you have undoubtedly experienced events in your life that have made you cry.
From "The Bad Beginning" by Lemony Snicket
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.
