Merriam-Webster!

Google Translate is a free online translation service that can instantly translate text and web pages between over 50 languages.

GoldenDict is an open-source dictionary program for PC computers that gives translations of words and phrases for different languages. It allows use of several popular dictionary file formats simultaneously.

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. No internet required!

Ludwig is a linguistic search engine that lets you search and solve your linguistic doubts, helpsyou to turn your ideas into well written texts, makes you more independent and confident at your job.

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. The Dictionary extension supports 11 different languages.

Wiktionary is a multilingual, web-based project to create a free content dictionary, available in 158 languages. Unlike standard dictionaries, it is written collaboratively by volunteers, dubbed "Wiktionarians", using wiki software, allowing articles to be changed by almost anyone with access to the website.

Lingoes is an easy and intuitive dictionary and text translation software. It offers lookup dictionaries, full text translation, capture word on screen, translate selected text and pronunciation of words.Lingoes sits in the system tray and becomes ones pop-up dictionary and thesaurus, as well as ones text and URL translator both from and to English, French, German, Spanish, Italian, Russian, Chinese, Japanese, Korean, Swedish, Thai, Turkish, Vietnamese, Greek, Polish, Arabic, Hebrew and more than 80 other languages. Included in its bag of pop-up tricks are conversion tools, calculators, abbreviations, word origins, slang, idioms and much more. Entire dictionaries may be freely downloaded; and realtime look-ups at several well-known online dictionaries and translators is built right in. »

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

Linguee is both an editorial dictionary and a search engine for translations from the bilingual web. Our language pairs include EnglishGerman, EnglishFrench, EnglishSpanish, and EnglishPortuguese with more languages to come. Check us out on www.linguee.com !

dict.cc is not only an online dictionary translating from English and German to 21 languages. Its an attempt to create a platform where users from all over the world can share their knowledge in the field of translations. Every visitor can suggest new translations and correct or confirm other users suggestions. The challenging and most important part of the project is the so-called Contribute! system making this process possible.

Vocabulary.com is the easiest, most intelligent way to improve your vocabulary. It combines an adaptive learning system (The Challenge) with the world’s fastest dictionary (The Dictionary) so that you can more quickly and more efficiently learn words.

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, Columbia encyclopedia, Wikipedia encyclopedia, examples from classic literature, pronunciations, word browser, glossary.

S3.Google Translator - this extension for Mozilla Firefox browser make much easy visit of websites on foreign language. Translation of selected text, introduced by a phrase or a fully web-site from any language to any language

Reference.com offers a massive online dictionary, thesaurus, encyclopedia, quote finder, and translator (powered by Google Translate)- all for free. For the Dictionary.com and Thesaurus.com mobile app, go here. Dictionary.com