English Dictionary & Thesaurus

Contains adsIn-app purchases
4.2
29.5K reviews
5M+
Downloads
Content rating
Everyone
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About this app

WordNet® is a large lexical database of English with up to 140,000 entries and more than 1.4 million words, developed by the Cognitive Science Laboratory at Princeton University.

Instead of following the standard dictionary format, the WordNet dictionary is organized with an innovative and convenient approach. Nouns, verbs, adjectives and adverbs are grouped into sets of cognitive synonyms, interlinked by means of conceptual-semantic and lexical relations. In addition to the straightforward definition the dictionary shows how each word is linked to other words in terms of synonyms, opposites and similar words, but also hyponyms and hyperlinks within the group.

The resulting network of meaningfully related words and concepts:
 • helps you to better understand the word meanings,
 • facilitates the quick finding of the correct meaning,
 • allows you to quickly memorize words.

Also included a Comprehensive Dictionary and Thesaurus:
 • Straightforward and precise definitions of over 140,000 words with more than 250,000 links and 1.4 million words.
 • Synonyms, antonyms, similar and related words to help you make your writing and speech more interesting.
 • Hypernyms (more generic words), hyponyms (subordinate words) and meronyms (part names)
 • Examples illustrate how words are used and show typical constructions and collocations.

NEW! Translate words in any other Android app with the Tap to Translate feature, and do it in style with any of the four colorful new themes.

Also includes advanced search and language tools that have become the staple of quality language apps from MobiSystems, Inc.

SEARCH TOOLS - effortlessly find words thanks to a clear, functional, and easy-to-use interface.

Designed to provide the most comprehensive search experience the dictionary combines several search tools to match or suggest what you are looking for, including:
 • Search autocomplete helps you find words quickly by displaying predictions as you type
 • Keyword lookup allows you to search within compound words and phrases
 • Looking for a specific word but don't know how it's spelled? We've got you covered with our automatic ‘Fuzzy filter’ to correct word spelling, as well as ‘Wild card’ ('*' or '?') to replace a letter or entire parts of a word
 • Camera search looks up words in the camera viewfinder and displays results in seconds
 • Use our Voice search when you don't know how an entry is spelled
 • NEW! Tap to Translate entries in other apps.
 • Share word definitions via installed apps on your device


LEARNING TOOLS - engaging features that help you further enhance your vocabulary.

 • Designed to give you the freedom to structure your studies the way you see fit the 'Favorites' option allows you to create custom folders with lists of words from the vast library of entries
 • ‘Recent’ list to easily review looked-up words
 • Learn a new word every day with our ‘Word of the day’ option
 • Home screen widget providing random words at a glance

Get even more with PREMIUM:
 • Priority support - Get expedited support for any app-related issues
 • No ads - no more in-app advertisements
Updated on
Feb 12, 2024

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Financial info, App activity and 2 others
Data isn’t encrypted
Data can’t be deleted

Ratings and reviews

4.2
27.6K reviews
Spider Webb
June 23, 2021
I liked this app ok & it was handy. Then after an update, when you go to research a word, a full sized page add pops up! This was then VERY annoying. Update: I've had this app for many years. I downloaded the free app. Now anytime I try to look up a word a page pops up saying "Do More with Premium". And in red says My free trial is over! Didn't say that it was a free trial when I downloaded it. It's greed, that's all. Uninstalling, bye, no bucks from me.
7 people found this review helpful
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Stingray Seven
December 23, 2020
Mobi Systems continues to deliver with another outstanding app. However, I wish it had a night mode to facilitate easier reading at night. And would like to see additional words /meanings added on a regular basis. UPDATE: Mobi Systems has updated it's app to offer multiple color theme choices that make it easier to read at night and other challenging conditions. They've also increased the additional words/meanings provided on a regular basis. Great Job Mobi Systems!
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A Google user
April 21, 2020
It's a versatile full feature dictionary & thesaurus with an offline database that's available through the app for download. It also has a 'tap to translate' feature that makes for easy usability when looking for a definition in any language the app supports. There are plenty of dictionaries to download for no cost which only expands it's versatility. I'm quite pleased with the app
122 people found this review helpful
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What's new

In our ongoing efforts to improve user experience, we've focused on refining app performance and resolving issues to ensure a more seamless and reliable experience through the world of words.