Opening the iTunes Store.If iTunes doesn't open, click the iTunes application icon in your Dock or on your Windows desktop.Progress Indicator
Opening the iBooks Store.If iBooks doesn't open, click the iBooks app in your Dock.Progress Indicator

iTunes is the world's easiest way to organize and add to your digital media collection.

We are unable to find iTunes on your computer. To buy and download Merriam-Webster Dictionary & Thesaurus by Merriam-Webster, Inc., get iTunes now.

Already have iTunes? Click I Have iTunes to open it now.

I Have iTunes Free Download
iTunes for Mac + PC

Merriam-Webster Dictionary & Thesaurus

By Merriam-Webster, Inc.


Open iTunes to buy and download apps.


Get America’s most useful and respected dictionary, optimized for your iPhone, iPad, and Apple Watch. This is the best iOS app for English language reference, education, and vocabulary building.

And now we’ve added new word games! It’s never been more fun to learn new words and test your vocabulary for everyone from English learners to total word nerds. Hundreds of words to test your skills.

Offline access: You’ll have complete access to definitions and synonyms whether or not you’re connected. You will need a connection to view illustrations, hear audio pronunciations, and use voice search.

Selected as a "Best New App" by iTunes.


* No ads
* Full Thesaurus: more than 200,000 word choices, examples, and explanations
* New Vocabulary-Building Quizzes: fun, fast quizzes to learn new words or test your vocabulary
* Voice Search: look up a word without having to spell it
* Word of the Day: learn a new word every day.
* Example Sentences: understand how a word is used in context
* Quick Definitions: perfect for on-the-go lookups
* Audio Pronunciations: voiced by real English speakers, not text-to-speech robots
* Favorite Words and Search History: Keep track of the words that are most important to you
* Apple Watch Extension: See Word of the Day, look up words with voice search, and keep track of your favorites from your watch
* Premium Content: over 1000 graphical illustrations, and over 20,000 additional entries covering people, places, and foreign terms

Please click the link to the Application License Agreement, below, which includes our App Privacy Policy.

What's New in Version 3.4.3

New Weekly Challenge quizzes! A new word quiz every week!
Bug fixes
UX improvements

iPhone Screenshots

iPhone Screenshot 1
iPhone Screenshot 2
iPhone Screenshot 3
iPhone Screenshot 4
iPhone Screenshot 5

Apple Watch

iPhone Screenshot 1
iPhone Screenshot 2
iPhone Screenshot 3
iPhone Screenshot 4
iPhone Screenshot 5

Customer Reviews


I am really happy with this App. One thing I wanted that many dictionaries don't have is to be able to say the word when I am unsure of the spelling. This App will bring the word up and it's correct spelling. No more embarrassing errors.

The thesaurus works great and definitions are easy to understand. So happy with this App. I do not know how anyone could possibly do without a dictionary and thesaurus especially if they write letters to a number of people. The thesaurus helps to make your letter more colorful as well as not over using a word. You never have to worry about a mid-spelling and letters are always more interesting with a bountiful of words at your fingertips.

Must give this one a review

This is a great app. Just some little things I cannot get used to in the quizzes. That time is ridiculous with only 10 measly seconds before it gives you a times up. For someone who has difficulty reading at a fast pace, it is a bit ambitious for me getting one answer right. Since I read each letter of the word before it takes shape in my mind well enough for me to understand it. It would be more enjoyable to let us decide how we want it timed, weather it be 10 seconds or two whole minutes. That would be grand for me and probably other folks who have trouble reading quickly. Thank you for this app though. Serves it's purpose and more.

Very Handy

This is my go-to app when I want to spell a word correctly, learn what a word means, or find a synonym I'd rather use. It's also handy for various word games I enjoy beyond just crossword puzzles. As far as I can remember, in the several years I've used this app I've almost always found what I was searching for. The history of words interests me so I also like having that included. The various word games are pleasant ways to pass time otherwise spent just waiting around for whatever. As long as my phone has power I can avoid boredom under most circumstances.

Merriam-Webster Dictionary & Thesaurus
View in iTunes
Offers Apple Watch App for iPhone
  • $3.99
  • Category: Reference
  • Updated:
  • Version: 3.4.3
  • Size: 74.3 MB
  • Apple Watch: Yes
  • Language: English
  • Seller:

Compatibility: Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

Current Version:
All Versions: