Google Dictionary

Google's dictionary extension on Google Chrome. With it, you can double-click any word to view its definition in a small pop-up bubble, or search the complete definition of any word or phrase using the address bar dictionary.

Free Chrome OS Chrome

Dictionary.com

The free Dictionary.com app delivers content from Dictionary.com and Thesaurus.com, including nearly a million words and definitions and 90,000 synonyms and antonyms.

Free Android iPhone Web Windows Phone

WordReference

WordReference is a free online Oxford dictionaries for Spanish, French, Italian, German and more. Conjugations, audio pronunciations and forums for your questions.

Freemium Android iPhone Web

Wiktionary

Wiktionary is a multilingual, web-based project to create a free content dictionary, available in 158 languages.

Free Open Source Android Web

Apple Dictionary

Your Mac also comes with a versatile Dictionary application. It also includes to other reference libraries such as thesaurus, Apple glossary, and Wikipedia.

Free Personal Mac OS X

Merriam-Webster

Free online dictionary, thesaurus, spanish-english and medical dictionaries, audio pronunciations, Word of the Day, word games, and many more high-quality Merriam-Webster language resources. Merriam Thesaurus online https://www .

Free Android iPhone iPad Web

The Free Dictionary

Online Dictionary - Multiple dictionaries including: English dictionary, medical dictionary, legal dictionary, financial dictionary, computer dictionary, thesaurus, dictionary of acronyms and abbreviations, dictionary of idioms, thesaurus...

Freemium Android iPhone Android Tablet Web

Blueseal Dictionary

Comprehensive dictionary of English, German, Spanish and French including synonyms.

Free Mac OS X Windows Linux Android iPhone Chrome OS Web Blackberry

Lion (LEO dictionary)

Lion allows you to send a query to the German-English, -French, -Spanish and -Italian LEO dictionaries (Chinese is currently not supported) with a click of your mouse from almost all MS Windows applications.

Free Personal Windows Android iPhone Blackberry Windows Phone HP webOS S60

Glosbe

Huge collaborative massively multilingual dictionary.

Free Personal Web

Visuwords

The fun and free way to look up definitions. THE graphical dictionary and visual thesaurus. We love words.

Free Web

Ultralingua

At Ultralingua, we make software for people who love languages. We focus on high quality consumer applications for mobile devices, and offer our linguistic APIs to partners in a variety of fields.

Freemium Mac OS X Windows Android iPhone Android Tablet iPad Web

Define

Define is the fastest and most lightweight dictionary application you have ever seen on iOS! Define relies only on the internal dictionary Apple hides inside your iOS device. No need to be constantly reliant on an internet connection.

Free Open Source iPhone iPad

Advanced English Dictionary

Advanced English Dictionary is better than other dictionaries, not just because it contains far more words than a conventional paper dictionary, but because it uses a...

Commercial iPhone Blackberry Java Mobile S60

term.ly

term.ly is a way to explore the English language. It is a semantic reference. A dictionary. A thesaurus. A reference tool. Maybe more. Maybe less.

Free Web

Thesaurus.com

Thesaurus.com is the world’s largest and most trusted free online thesaurus brought to you by Dictionary.com. For over 20 years, Thesaurus.com has been helping millions...

Free Chrome OS Web Google Drive - Docs

Allkdic

Handy status bar dictionary.

Free Mac

Ninjawords

Ninjas are three things: Theyre smart, theyre quick, theyre deadly accurate—Ninjawords is a dictionary for the iPhone built on these principles. We made it because we...

Commercial iPhone