English as a Foreign Language

Ingrid Kerkhoff

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Start Service Dictionaries and Glossaries

Online Dictionaries

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Acronym Finder
Find out what any acronym, abbreviation, or initialism stands for. With more than 1,000,000 human-edited definitions, Acronym Finder is the world's largest and most comprehensive dictionary of acronyms, abbreviations, and initialisms. Combined with the Acronym Attic, Acronym Finder contains more than 5 million acronyms and abbreviations. You can also search for more than 850,000 US and Canadian postal codes.

Biology Online
A completely free and open dictionary with over 60,000 biology terms. It uses the wiki concept, so that anyone can make a contribution. Provides a wealth of information offering a forum for discussion, an editable-dictionary with thousands of terms, links to external resources, tutorials, articles and a biology book catalogue with user reviews.

Cambridge Dictionary

dict.cc is not only an online dictionary. It's 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.
To guarantee that the users' work is not lost in case something happens to the maintainer of dict.cc (Paul Hemetsberger), the resulting vocabulary database can be downloaded anytime.

Dictionary.com is the world’s leading online source for English definitions, synonyms, word origins, audio pronunciations, example sentences, slang phrases, idioms, word games, legal and medical terms, Word of the Day and more ...

Green's Dictionary of Slang
Five hundred years of the vulgar tongue: historical dictionary of English slang.

Law Dictionary
Legal Terms and Definitions. Easy-to-read definitions from The People’s Law Dictionary Law.com is a source for trusted and timely legal news and analysis. Each practice area offers a rich selection of articles, curated by ALM’s expert editorial team.

Das Sprachangebot für Englisch-Deutsch: Wörterbuch mit Übersetzungen, Flexionstabellen und Audio, interaktivem Forum und Trainer für flexibles Lernen.

Merriam-Webster Visual Dictionary online
A quick glance at the index is all it takes to connect words with images. Explore the 15 major themes to access more than 6,000 images and see words

NetLingo explains thousands of terms that define our life online, including the largest list of chat acronyms

One Look
Meta-search tool indexing more than 19 million words from 1,000 online dictionaries. It also has a reverse dictionary and translations.

Rhyming Dictionary
Find rhymes, synonyms, definitions, and more!

The Free Dictionary
You can find a dictionary, thesaurus, medical ditionary, legal dictionary, financial dictionary acronyms, idioms, encyclopedia, an English language forum and so much more.

The Science Dictionary
A specialized science search engine that queries billions of the web’s top science pages for scientific information. Researchers, students, and professionals around the world use The Science Dictionary as their goto website for finding relevant scientific information.

Urban Dictionary
An online slang dictionary which contains many non-explicit definitions. You can find it in several languages such as Spanish, Bengali, Polish, Serbian, Chinese and so on.


Interactive dictionary and thesaurus which creates word maps that blossom with meanings and branch to related words.


Online tech dictionary for IT professionals, educators and students. the tool provides definitions to words, phrases and abbreviations related to computing and information technology.


Dictionary with 17 different languages and a quantity of combinations. It is called the holy grail of free online language dictionaries. It has also forums where you can ask your doubts and questions.







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