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 download the free app American Heritage Dictionary, 5th Edition by Houghton Mifflin Harcourt, get iTunes now.

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

I Have iTunes Free Download
iTunes for Mac + PC

American Heritage Dictionary, 5th Edition

By Houghton Mifflin Harcourt

Open iTunes to buy and download apps.


Celebrating the relaunch of the American Heritage Dictionary®. The Fifth Edition of The American Heritage® Dictionary of the English Language is one of the most comprehensive and accessible resources available on any mobile device.

*** This is ""free-to-download"" but not a free app. It requires a single use, single device redeem code OR an InApp purchase. ***
• For new users, an InApp purchase is required to activate the dictionary.
• For previous AHD5 owners: if the app does not activate automatically, please email support.

This latest edition has been much anticipated:
10 Years
20 Lexicographers
200 Usage Experts
10,000 New Words and Senses
1 Defining Achievement

Keep the hardcopy at home and take the app with you wherever you need it.

Main Features
• entire text of this landmark new edition
• complete offline use — no Internet connection needed
• complete front matter and appendices
• real-time progressive searching
• three-way cross-referencing indexes
• wildcard pattern searches
• spelling suggestions
• internal hyperlinking
• word-of-the-day
• zoomable graphics
• full pronunciation symbols chart
• IPA pronunciation symbol conversion
• detailed etymologies with links to root appendices
• professionally recorded sound files
• automatic search history
• two-way external application interaction
• bookmarks with editable notations
• OS-independent app localization
• iPod, iPhone & iPad compatible “universal app”
• retina display support
• make-your-own flashcards
• external monitor and TV output supported

Social Media
• Facebook APIs supported
• Twitter & Evernote posting
• full layout for definition e-mails and Evernote posts

In keeping with the American Heritage® tradition of cutting-edge research, the Fifth Edition represents the work of a dedicated team of experts, scholars, and contributors. Thousands of definitions have been revised in rapidly changing fields such as astronomy and biology; geographical entries and maps have been completely updated; and the dictionary’s signature feature notes on word history, synonymy, and language variation have been enhanced and improved.

Word meanings are made easier to understand with thousands of new quotations from classic and contemporary writers. Etymologies explaining word origins and development have been newly created or revised to reflect the very latest scholarship. Many words are traced back to their roots in prehistory through two unique appendices showing word roots from the ancient Indo-European and Semitic languages.

Easy to navigate, enlightening, and visually stunning, the Fifth Edition of The American Heritage® Dictionary of the English Language gives you the opportunity to make your mark in the best possible way.

What's New in Version 6.2

Semiannual editorial update including hundreds of revisions and new words.


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

Customer Reviews

Worst customer service EVER!!!!!!!!!!!!

This app disappeared twice with Apple iOS upgrades while all my other apps remained on my iPad. After endless emails to their support group to restore the app to no avail, I ended up buying the app twice because it is a great dictionary. Now with my new iPhone I restored my apps and the Ahd5 once again failed to restore. I have sent then probably over twenty emails and they keep asking me for information, my purchase date and purchase number. I have sent them my purchase history which is generated by Apple showing I purchased a legitimate app. AHD5 support keeps asking me for that info and I keep giving it to them but I suspect they can't read or the just don't give a flying "F" and hope I will go away. I will keep trying but I want to dissuade anybody thinking of buying this app to LOOK ELSEWHERE. I WOULD GIVE THIS APP zero stars if I could. A negative 5 stars would be more accurate.

Paid $25 for app that doesn’t work

I purchased the 4th edition, and ever since iOS8, the app has crashed any time I went to the search window.
I wrote the authors, and they told me “too bad, so sad, we don’t plan to fix that bug, buy the 5th edition for $25”
I asked about an upgrade deal, and since I bought the app when it first came out I am not eligible for an upgrade, and apparently not eligible for a working app either.
I was excited to see a recent update, thinking they might have fixed the iOS8 issue, but no, they were adding some support for some Evernote stuff, not support for the current iOS.
Don’t waste your money, there are tons of FREE dictionary web sites out there.

Ads?? I won’t know.

I have used this dictionary app from the very beginning. I bought it right away as I knew I wanted a dictionary, and I knew this was a good one. Used it and upgraded it for years (free upgrades, I might add). Eventually I upgraded to iOS 8 and it would not open. So I came to this page to see how to contact them, - and I see you all are saying it has ads??? In an app this expensive? What a huge disappointment. I also have the Oxford American dictionary, so I guess I will just stay with that one. This is a big disappointment. Houghton Mifflin Harcourt - if the above is not correct, please let us know. Thank you.

American Heritage Dictionary, 5th Edition
View In iTunes
This app is designed for both iPhone and iPad
  • Free
  • Category: Reference
  • Updated:
  • Version: 6.2
  • Size: 656 MB
  • Languages: English, Bosnian, Chinese, Portuguese
  • Seller:
Rated 12+ for the following:
  • Infrequent/Mild Cartoon or Fantasy Violence
  • Infrequent/Mild Mature/Suggestive Themes
  • Infrequent/Mild Realistic Violence

Compatibility: Requires iOS 5.0 or later. Compatible with iPhone, iPad, and iPod touch. This app is optimized for iPhone 5.

Customer Ratings

Current Version:
All Versions:

Top In-App Purchases

  1. American Heritage Dictionary, Fifth Edition$24.99