WorldCat is the world's largest network of library content and services. WorldCat libraries are dedicated to providing access to their resources on the Web, where most people start their search for information.

Dictionaries

Cambridge Dictionaries Online

Collins

Dictionary.Com

Macmillan Dictionary

Merriam - Webster

Oxford English Dictionary

Oxford Learners Dictionaries

The Free Dictionary

Urban Dictionary

Your Dictionary

Encyclopedias

Encyclopedia Britanica

Computer Desktop encyclopedia

Encyclopedia of Life

Internet Encyclopedia of Philosophy

Info please

Country Reports

Look Lex Encyclopedia

Atlapedia

Tech Encyclopedia

Encyclopedia.Com

Thesaurus

Thesaurus.com

Visual Thesaurus