Search various on-line dictionaries.

A free English thesaurus and dictionary for Windows.

A collection of reference tools.

The European Commission's multilingual term bank. Particularly rich in technical and specialized terminology related to European Union policy.

An obscure, abstruse and/or recondite word is posted on a daily basis. Subscription available.

Project to create an searchable online database and a quotation dictionary from Yale University Press.

Irreverent and amusing definitions.

Multi-search tool by Tinh Van, which consults English-only dictionaries, and Vietnamese into English or French translation dictionaries.

Directory of English and foreign-language dictionaries.

This database doubled with a metasearch tool extracts records from a variety of online and public-domain paper dictionaries, both general and specialized. It offers English definitions, as well as translations from/to a hundred languages.