Lex Scripta: Dictionaries of Phrases and Acronyms

Dictionaries of Phrases and Expressions Used in English
Cambridge International Dictionary of Idioms
Part of the on-line suite of Cambridge dictionaries.
The Phrase Finder
Meanings and origins of commonly used phrases.
Cliché Finder
Enter any words, and the search engine will return any clichés which use those words.
Commonly-Used Proverbs
For "English as a Second Language" students.
"So to Speak"
Another glossary of clichés.
Ye Olde English Sayings
A short glossary of expressions.
The Dictionary of Phrase and Fable
By E. Cobham Brewer, from the new and enlarged edition of 1894.
Glossary of Foreign Words and Phrases
A listing of foreign expressions commonly used in English.
Latin Phrases
As commonly used in English.
Forthright's Phrontistery International House of Logorrhea
A pretentious listing of obscure and unusual words in English.
Glossary of the Stammtisch Beau Fleuve
A bizzare collection of obscure and unusual words, abbreviations and acronyms.
Wayne Magnuson English Idioms
Slang and Sayings

Dictionaries of Acronyms
Acronym Finder
Over 130,000 acronyms and abbreviations.
Acronyms used in the Computer Community
As used in chat-rooms, on bulletin boards, and (increasingly) in email messages.
Acronym Lookup
A "gopher" search utility.
Acronyms and Abbreviations
In English and German.
Glossary of the Stammtisch Beau Fleuve
A bizzare collection of obscure and unusual words, abbreviations and acronyms.