Cambridge Dictionaries Online Comprehensive dictionary of American and British English, phrasal verbs and idioms. English/English, French/English, Spanish/English, and more combinations.
Collins dictionaries An excellent online resource, containing an English, French, Spanish, German and Italian dictionary, as well as Thesaurus, Translator, Blog and other useful tools.
Wordreference A free bilingual dictionary with many language combinations, including English-Greek and vice versa.
Specialist English
Oxford Reference A collection of over 125 subjects and dictionaries, in one single database. This useful resource needs subscription, but you can occasionally find free definitions.
IATE Terminology for the European Union. Includes a great number of terms in the areas of finance, economics, business, science, industry, and others. English/Greek, Greek/English, and many other language combinations
English for Economics and Business
Cambridge Business Dictionary Along with regular terms, Cambridge Dictionaries Online offer explanations for economics and business-related terms. Just type the term you want and click on the “Business” tab at the results page.
Investopedia The site contains a great number of financial terms together with a detailed explanation of their meaning. English/English
The Economist Glossary of economic terms, topics and jargon
English for Information Technology and Computing
Webopedia Dictionary for computer and internet terms and definitions.
Λεξικό Ηλεκτρονικής Διακυβέρνησης Developed by ICSD postgraduate students, this dictionary contains Greek translations and explanations of IT terms.
Microsoft Language Portal A computing terminology database with many language combinations, including Greek translations and explanations.