Download the number one free dictionary app with English language learning tools built for every level of learner.
With more than 2 million trusted definitions and synonyms, the Dictionary.com English dictionary and thesaurus app for iPhone is optimized with your mobile device in mind to help you learn English or improve your English vocabulary. It even works offline!
Install the offline dictionary for access to definitions and synonyms whenever and wherever you need them — no bulky books necessary.
In addition to the trusted reference content from Dictionary.com and Thesaurus.com, this education app includes:
- Word of the Day – Learn a new word each day and expand your vocabulary education
- Synonyms — Get thesaurus content alongside your dictionary definitions
- Audio pronunciations – Never mispronounce another word
- Voice search – Find the definitions you’re looking for anywhere, anytime
- Wordplay — Improve your vocabulary with fun quizzes
- Grammar help - Get grammar tips, word usage, and more
- Favorite words and search history - Customize your recently searched word list, and never forget the newest words you’ve learned
- English spelling help - Not sure how a word is spelled? This app will find it for you.
- Learner’s dictionary - Includes extra information about word usage for English learners
- Optimized for Apple Watch!
Get even more from your app with our Upgrades:
- Example Sentences
- Idioms and Phrases
- Medical, Science, Rhyming Dictionaries
- Offline Dictionary + Remove ads
Or you can get all of this additional content and remove ads for one low price with our Pro App.
Crash, boom, and bang are all examples of onomatopoeia.
Good news! We’ve made some fixes so your app won’t crash. Now you can go look up the meaning of onomatopoeia, and tweet us what you find: @dictionarycom!
Ratings and ReviewsSee All
[Update] The developer has replied to me. Thank you. They are considering my suggestion. I will be purchasing the pro version together with the medical version upgrade. The pattern matching is essential to me for my crossword passion.
What this lacks is pattern matching. I would definitely pay for the Pro version if it had this feature.
Developer Response ,
We are glad to hear you are enjoying the app, and appreciate your sharing your suggestion! We'll be sure to share your sentiment with our Lexicography and App teams, to consider.
Your new update is terrible 🤬
Hate it, hate it hate it. The new version is too confusing and fussy on the eye. Too irritating to use. Will probably find a better app. You also ignore the British and Australian spellings. These are the correct ones. The American versions are a corruption. Why not accept both?
Having definitions and synonyms colour coded is good, but three columns with the text wrapped is painful on the eye and extremely confusing. Please put them back into one column, or two if you must. Three is too much for an iPhone. It is essential that you acknowledge the correct British spellings of words. It is American imperialism at its worst not to. There are hundreds of millions of people round the world who use the Queen’s English and do not know what the bastardised American spellings are. It would only be to your benefit to rid yourself of this Americocentric image you currently have.
Developer Response ,
Thanks for sharing your thoughts about our American English Dictionary, and the latest update on our app.
To be clear, we are an American English dictionary, and do currently focus on the American English dictionary entries. Our focus is not a matter of 'American Imperialism', rather, that we are an American company, with an American English corpus of words to work from, and lexicographers who specialize in American English; furthermore, we have limited resources and do have to focus our business model. We hope you can appreciate that our small team is hard at work managing and updating the entire dictionary and thesaurus, building and maintaining our website and apps, answering our customers (like you), and creating the content our customers so enjoy. While we may offer some limited content, at times, we cannot commit to expanding more broadly to support an entire dictionary corpus of words from British-English, Australian-English, South African-English, Irish-English, Indian-English, or the myriad other delightful ways people around the world speak English!
That said, if you are looking for a British English Dictionary, we would take a moment to recommend our sister site, Lexico.com. Lexico is a dictionary partnership between Dictionary.com and Oxford University Press, where all the dictionary content is provided by Oxford Languages Lexicographers. While Lexico does not have a mobile app, you may find this website to be a better fit for your needs if our American English isn't to your preference, and should you prefer a British English dictionary.
Finally, we do appreciate your thoughts about the recent updates to the visual experience on our app. We appreciate your comments, particularly those about the synonyms and color coding. We are sorry to hear of the confusion with viewing, given the text wrapping. We'll definitely add this to your prior comments about the changes, and share them with our app team.
Thanks for sharing your perspective, and for using our app.
I’ve been using this app numerous times daily now for quite a few years.
However after resetting my iPhone I have been charged a second time for the upgrade for no advertisements.
- Dictionary.com, LLC
- 42.4 MB
Requires iOS 10.0 or later. Compatible with iPhone, iPad and iPod touch.
- Age Rating
- © Dictionary.com, LLC 2018
- In-App Purchases
- Example Sentences $4.49
- Encyclopedia $4.49
- Medical Dictionary $4.49
Up to six family members will be able to use this app with Family Sharing enabled.