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 whether or not you’re connected.


* Universal App
* New Vocabulary-Building Quizzes: fun, fast quizzes to learn new words or test your vocabulary
* Additional resources available with in-app purchases
* Voice Search: look up a word without having to spell it
* Word of the Day: learn a new word every day.
* Integrated Thesaurus: synonyms & antonyms are included with the dictionary
* 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
* Favorite Word syncing through iCloud: Share your favorites between devices
* Apple Watch Extension: See Word of the Day, find watch-sized definitions with voice search, and keep track of your favorites from your watch

Fully featured and absolutely free, this app is supported by ads. You can remove ads for $2.99 per year with an in-app purchase charged to your iTunes account or $5.99 per year with additional resources. Prices vary by location. Your subscription will automatically renew unless cancelled at least 24 hours before the end of the subscription period. You can manage your subscription in your account settings.

Terms of Use:

What’s New

Version 5.3.0

Support for upcoming iOS version 14.5.

Ratings and Reviews

4.7 out of 5
1.9K Ratings

1.9K Ratings

Homesick Pom ,

Love it

This is my favourite app. Informative, fun, easy to use with definitions of words; original meanings; quizzes of words both old and new plus a word of the day. I thought my vocabulary was quite good, but it is improving daily! As I love to read and find the English language fascinating, I can’t recommend this app highly enough.

Neddy ,

Same App, Pay Twice

I, like many other Merriam-Webster users, bought their Collegiate dictionary a while back for a purchase price of AUD$30. Now, with iOS 11, they stop support for that app and—weeks later—release a “brand new” dictionary requiring existing customers to pay again ... to remove ads.

This is shameful behaviour. Imagine you buy an app and then it stopped working. The developer refuses to update it. The next day, the same company releases basically the same app, but wants you to pay again to use it. Absolutely shameful behaviour, and I’m surprised Apple would allow this.

CoolArmy ,


My backpack was heavy, I had stuff to do and no more fun. I’ve used Merriam Webster dictionary for about a year and it’s been so helpful and a LIFE CHANGER it has helped me so many times and I highly recommend this app if you study often or don’t have a dictionary. Best free dictionary app so far :3

App Privacy

The developer, Merriam-Webster, Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer's privacy policy.

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Purchases
  • Search History
  • Identifiers
  • Usage Data
  • Diagnostics

Data Linked to You

The following data may be collected and linked to your identity:

  • Purchases
  • Contact Info
  • Search History
  • Identifiers
  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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