Webster Dictionary: Merriam-Webster Online
Comprehensive dictionary online version.
OneLook is a meta-dictionary. Enter an English language word or acronym, and One Look will search its index for the definition.
A Web of On-line Dictionaries
Directory of over 600 on-line dictionaries. Strong coverage of foreign language and other specialized categories.
The only online dictionary and search engine you need for computer and Internet technology definitions
Funk & Wagnalls New World Encyclopedia
Webster Thesaurus: Merriam-Webster Online
Standard modern thesaurus.
Experimental lexical database developed at Princeton. Not precisely a thesaurus, but words are organized into synonym sets so it can be used as one. Worth a try if the other thesauri do not produce the desired results.
Greater depth than the Merriam Webster Thesaurus, but its age occasionally shows. Thesaurus.com has a simpler interface and faster searches, but includes advertisements.
Quotations & Phrase Origins
Bartlett's Familiar Quotations (1901 ed.)
A collection of passages, phrases, and proverbs traced to their sources in ancient and modern literature.
Dictionary of Phrase and Fable (1894 ed.)
Gives the original context for famous expressions and idioms.
Style Manuals & Grammar Guides
University of Illinois' Writers' Workshop Online Writing Guide
An excellent source that will cover most grammar and writing needs. Includes full APA and MLA style manuals, a grammar handbook, and an informative section on writing techniques.
Citing Electronic Resources Internet Public Library collection of style manuals and guides on how to cite sources found on the Internet or other electronic formats.
The Slot: A Spot for Copy Editors
Written by a Washington Post Copy Editor, this site serves as a supplement to the AP stylebook. Contains good advice on lots of tricky or picky situations and is fun to read.
William Strunk Jr.'s Elements of Style (1918 ed.)
The classic guide to usage, composition, and form for the English language.
Source: This page was adapted from the University of Illinois Library Website.