- Dictionary of American Idioms. More than 8000 idiomatic words and phrases of American English online.
- English Daily - Slang. Hundreds of idioms and slang with definitions, examples, etymology.
- English-Zone - Idioms. Categorized Idioms with exercises to practice using them.
- English Idioms and Proverbs. Idioms with pictures, example sentences, and good explanations
- Idiom Dictionary. Search for an idiom from over 7,000 idioms current in British, American and Australian English.
- Answers.com's Idiom Pages. Where you can find almost any idioms you are looking for.
- Idiom Connection. A collection of idioms, phrasal verbs and proverbs generally expected to find in the average home, and workplace.
- English Idioms, Sayings, and Slang. Idioms in alphebatical order, each with a definition, and an example sentence.
- Dictionary of Slang. English slang and colloquialisms used in the United Kingdom.
- Australian Slang. Australian English Glossary from A to Zed.
- Pocket English Idioms. Hundreds of idioms. Click a keyword and get the idiom with an example sentence.
- Self-Study Idiom Quizzes. Including phrasal verbs, and slang, divided into medium and difficult levels.
- Business Idioms. Choose an idiom and click on it to go directly to the explanation and example.
- Dictionary of English Idioms & Idiomatic Expressions. A list of 1,885 Idioms in alphabetical order.
- Dennis Oliver's ESL Idiom Page. You can see a complete list, or meanings and examples.
- American English Business Idioms. A list of idioms commonly used in the American workplace with meanings and examples.
- Ridiculous Business Jargon. Over 350 of the worst phrases used in the business world today.
- Commonly Used American Slang. Nineteen pages of slang collected by Charles I. Kelly & Lawrence E. Kelly.
- The Idiom Collection. A big collection and many categories.
- Animal Idioms. A few interesting idioms containing animals' names.
- Idioms at Interlink Language Center. Multiple choice questions, match the meaning of an idiom.
- Idioms and Proverbs. Match the meanings of about thirty idioms.
- Speak Read Write. Hundreds of idioms, slang, phrasal verbs and proverbs with context examples.
- Slang City. Yeah, baby! Check out this cool online guide to American slang, including explanations of popular songs and movies, bad words, pronunciation and more.
- Idioms Site. Hundreds of idioms in alphabetical order. It also tells you where and when the idiom originated.
- Literature Quotes. Quotations from the great works of literature. You can search for quotations in a number of different ways.
- Paint by Idioms Learning idioms by playing games.
- Eye on Idioms. Complete the sentence by selecting the correct idiom from the list.
- Face Idioms. Match the idioms with their definitions.
- Spanish-English Idioms. There are many colorful Spanish idioms which have colorful English equivalents. Through a comparision of these idioms, learners of both the Spanish and English language can both learn more about the respective languages.