A browser for the English language


Terminology is a browser for the English language – part dictionary/thesaurus and part research tool. Terminology is designed to make 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.

On a Mac? Install Terminology in the system Dictionary App

Dictionary and Thesaurus

  • Full offline U.S. English dictionary and word reference with simple clear definitions of root words and phrases
  • Definitions, synonyms, antonyms and deeper word relations such as: more and less specific words, part, part of, members, member of, pertains to and more
  • Audio pronuciations
  • Share extension to lookup any text selection in any app
  • Favorite terms for quick access
  • Term browsing history
  • Add notes to any term
  • Term of the Day
  • Wildcard (?,*) searching
  • Spelling suggestions

Reference Tool

  • Actions extend your research with quick links directly to the terms you look up in web resources and other reference apps
  • Access iOS system dictionaries with “Look up” action
  • Action Library with pre-configured actions for popular reference, search and other resources–like Wikipedia, Google, IMDb and more
  • Create and share custom actions (Pro unlock required)
  • Load web resources using in-app browser or Safari
  • Deep link to terms in other apps when supported

Great Integration

  • Share extension and Today widget for quick access
  • 3D Touch and iPad Multitasking/Split View support
  • Dark theme with auto-switching (Pro unlock required)
  • iCloud sync of favorites, history and actions between multiple devices
  • Spotlight and Handoff support
  • Great Dynamic Text and VoiceOver support
  • Extensive support for URL scheme integration via x-callback-url. Details on the developer page