Download the #1 free dictionary app! With more than 2 million trusted definitions and synonyms, this English dictionary and thesaurus app for iPhone is optimized for your mobile device. Improve your English vocabulary, whether you're just starting your learning journey or you're already a word wizard. Install the app for access to definitions and synonyms whenever and wherever you need them — no bulky books necessary. Flip to dark mode to give your eyes a break, or stick to the traditional set-up. 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. Example Sentences ? Browse real-world example sentences to see how words are used. Idioms ? Explore how words can gain new meanings. Rhymes ? Finish every verse. Audio Pronunciations ? Never mispronounce another word. Grammar ? Get grammar tips, word usage, and more to improve your writing. Editorial Articles ? Explore editorial content for features on words, the origins of the English language, and the nuances that make English so complicated and unique. Search History ? Customize your recently searched word list, and never forget the newest words you’ve learned. Dictionary Shuffle ? Think you know ALL the definitions? Prove it with Dictionary Shuffle, which chooses a word at random and brings you to the definition. A-Z Dictionary ? What’s more exciting than ... wait for it … browsing the Dictionary?! We’ve now made it even easier, with the A–Z Dictionary.