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 Terminology: Dictionary, Thesaurus, Search by Agile Tortoise, get iTunes now.

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

I Have iTunes Free Download
iTunes for Mac + PC

Terminology: Dictionary, Thesaurus, Search

By Agile Tortoise

Open iTunes to buy and download apps.


Terminology is a browser for the English language – part dictionary, part thesaurus and part research tool. Terminology makes it easy to explore words and phrases, diving down to more and less specific terms - accessing the web and other apps for more detail and sharing.

More than a dictionary, Terminology can be extended with custom actions to search the Internet and other reference apps – making it a great place to start all your searches.

Use the share extension to select text anywhere, in any app, and look it up in Terminology.

### Dictionary, Thesaurus & Search

- Offline U.S. English dictionary and word reference with simple clear definitions.
- Definitions, synonyms, antonyms and deeper word relations such as: more and less specific words, part, part of, members, member of, pertains to and more.
- Favorite terms.
- Word browsing history.
- Add your own notes to any term.
- Audio pronunications.
- Wildcard (?,*) searching.
- Spelling suggestions.
- Fast, reliable, iCloud (CloudKit) sync and backup of history, favorites, notes and actions.
- Term of the day.

### Extensible Actions

Actions provide quick links to lookup and search your terms on websites and in other apps. Ready to use actions for popular reference sites like Wikipedia,, Google, IMDb, Snopes and more, or create your own with simple URL templates.

### All the Latest Technologies

- Share extension lets you access Terminology from a text selection in any app.
- Today widget for quick access.
- 3D Touch support.
- iPad Multitasking/Split View support.
- Spotlight and Handoff support.

### More Features

- Extensive support for URL scheme integration via x-callback-url. Visit our website for details.
- Great support for Accessibility features like VoiceOver and Dynamic Text.

### About the Dictionary

- Terminology's offline dictionary is based on the latest 3.1 version of the Princeton University WordNet project and contains U.S. English words.


We love to hear your feedback, please contact us.

Twitter/ @terminologyapp

What's New in Version 4.0.4

#### Visit our blog for more detailed release notes:

- **New:** Te:Define menu item allows lookup of text selections in existing definitions or in-app browser. Select text in an existing definition, or in a web page loaded via action in the app, and use the "Te:Define" item in the black text selection menu to lookup that term.
- **Fix:** Search field did not behave properly when typing some multi-byte languages.
- **Change:** Improve reliability of Spotlight indexing of terms.
- **Fix:** Make sure definitions scroll to top when navigating to new term.

Help & Support:
News and Tips: @terminologyapp on Facebook and Twitter

Review and ratings are always appreciated!


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


The developer is updating to wipe out bad reviews. Be sure to check back periodically. We'll just keep on giving 1 star.

Ugh, what a terrible approach...

Delete the version we paid for, then add ads to the new version without warning.

I understand there are some nice additions to the new version, and $2 bucks is a nominal upgrade fee, but what a terrible way to treat existing customers. If they had simply added the new version as a separate app, I would have checked it out and almost surely purchased the new version to support continued development. Now I'm likely to just delete the app. Grrr.

Suddenly, ads.

Purchased this app a while ago. Since the last update, I now have ads in the app - and must pay another $1.99 to remove them. Would not recommend anyone buy anything from a developer who does this kind of thing. Should have released a separate version of the app if he wanted to change his revenue model.

Terminology: Dictionary, Thesaurus, Search
View in iTunes
This app is designed for both iPhone and iPad
  • Free
  • Category: Reference
  • Updated:
  • Version: 4.0.4
  • Size: 102 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

Current Version:
All Versions:

Top In-App Purchases

  1. Pro$1.99