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 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 out with you wherever you need it.

Main Features:
● the entire text of this landmark new edition
● complete front matter and appendices
● real-time progressive searching
● three-way cross-referencing indexes
● wildcard pattern searches (with * ?)
● spelling suggestions
● internal hyperlinking
● 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
● 3D Touch support
● iPad Pro multi-screen and Drag & Drop
● iPhone X support
● make-your-own flashcards
● complete offline use - no Internet connection needed

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 in ancient Indo-European and Semitic.

Reliable, 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.


The American Heritage® Dictionary of the English Language, Fifth Edition published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


Powered by Enfour's "UniDict® Engine 8"

● This is "free-to-download" but not a free app. It requires an InApp purchase.

What’s New

Version 8.9

Search bug fix

Ratings and Reviews

3.0 out of 5
6 Ratings

6 Ratings

pr071x ,

Will upgrade soon

I am an avid AHD4 user, the dictionary remains a mainstay on my iPad dock because it's one of my most frequently used apps. I'm excited for this fifth edition, but I have not yet activated because I'm waiting for the upgrade option to become available. I wrote an e-mail to their customer support about it, and was answered back within the same day with courtesy. They have since been in regular contact with me, and I'm just waiting for the time that an upgrade option is introduced before I leap into this fifth edition. Until then, AHD4 will remain proudly on my dock- its a great app and I'm excited for the new one- I give it a four star rating for now because I'm confident it will be at least as good as AHD4, but can't fairly give it a five star until I've actually used it!

mtumatsci ,

Utterly broken

The latest update broke this app completely. You can search or browse for words, but no entry appears. Does anyone even try this stuff out before they ship it?

E10209 ,

Bookmarks issues

this is the worst app every, keeps loosing the bookmarks...


Enfour, Inc.
867.3 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Arabic, Bosnian, Catalan, Danish, Dutch, Finnish, French, German, Hebrew, Hindi, Hungarian, Indonesian, Irish, Italian, Japanese, Korean, Kurdish, Lithuanian, Malay, Persian, Polish, Portuguese, Russian, Simplified Chinese, Slovenian, Spanish, Swedish, Tagalog, Thai, Traditional Chinese, Turkish, Vietnamese

Age Rating
Infrequent/Mild Mature/Suggestive Themes
Infrequent/Mild Profanity or Crude Humor
In-App Purchases
  1. AHD5 -activation $14.99
  2. AHD4-user's discount - American Heritage® dictionary $19.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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