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.
Undoubtedly, this story will be making far greater waves in the UK than in the US, and in the end that may be the intention.
From BBC • Apr. 24, 2026
Undoubtedly the process complaints are merited, as there hasn’t really been a process.
From Slate • Mar. 4, 2026
Undoubtedly the most alluring feature for the reality star, however, was the home’s proximity to her existing abode, which she purchased for $20 million in 2014, while she was still married to rapper Kanye West.
From MarketWatch • Oct. 29, 2025
Undoubtedly, Anderson understood this could’ve been the case.
From Salon • Sep. 28, 2025
Undoubtedly Elinor had persuaded her to do that because she didn't trust him and because Meggie had refused to give Inkheart back to her.
From "Inkheart" by Cornelia Funke
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.
