Dictionaries
Websites
FOLDOC
http://foldoc.orgFOLDOC is a computing dictionary. It includes definitions of acronyms, jargon, programming languages, tools, architecture, operating systems, networking, theory, standards, mathematics, telecoms, elec...
Logos Dictionary
http://www.logosdictionary.orgThis freely-accessible multilingual dictionary, compiled without any form of public contribution, is growing constantly because it's updated and corrected on line by our network of professional transl...
Etymology Dictionary
https://www.etymonline.comThe Online Etymology Dictionary is a free online dictionary that describes the origins of English-language words.
Pseudodictionary
http://www.pseudodictionary.comPseudodictionary is an online dictionary for neologisms and protologisms. Site visitors submit an original word or phrase for inclusion, giving a description and an example.
Urban Dictionary
https://www.urbandictionary.comUrban Dictionary is a crowdsourced online dictionary for slang words and phrases, operating under the motto "Define Your World.
WordNet
http://wordnetweb.princeton.edu/perl/webwnWordNet is a lexical database for the English language. It groups English words into sets of synonyms called synsets, provides short definitions and usage examples, and records a number of relations a...
Wordnik
https://www.wordnik.comWordnik, a nonprofit organization, is an online English dictionary and language resource that provides dictionary and thesaurus content.