Acronyms, Initialisms, and Abbreviations Dictionary

Features definitions of a wide variety of acronyms, initialisms, abbreviations, and similar contractions that allows users to quickly and easily translate terms into their full names or meanings. New terms from subject areas such as associations, education, the Internet, medicine, and others are now included.

American Heritage Abbreviations Dictionary 

Definitions of popular American abbreviations, including more recent technological abbreviations. Includes acronyms, blends, clippings, foreign words, initialisms, numericals, and truncations.

American Heritage Dictionary of Idioms 

Dictionary containing idioms and popular phrases of the English language. Contains information about context and provides examples.

Credo Dictionaries 

Links to full text dictionaries, including foreign languages, subject areas, and the English language.

Dictionary of American Regional English (DARE)

Contains words and phrases that vary from one region of the United States to another. You can search by word or by region.

Dictionary of Contemporary Slang 

This book contains information about popular slang phrases in contemporary America.

Dictionary of Foreign Phrases and Abbreviations 

Alphabetical listing of foreign phrases, proverbs, maxims, and abbreviations frequently used in English.

Historical Dictionary of the 1950s

Providing a comprehensive overview, this book includes entries on the prominent people, major events, issues, scandals, ideas, popular culture, and court cases of the decade that gave rise to the tensions of the 1960s.

Dorland’s Dictionary of Medical Acronyms & Abbreviations

Dorland’s Dictionary (formerly Jablonski’s) contains medical abbreviations and symbols across all medical specialties.

Merriam-Webster Online Dictionary and Thesaurus 

While not as comprehensive as other sources, this is a good quick reference site from an authority in dictionary publishing.

OneLook Dictionaries 

OneLook is a meta-dictionary. Enter an English language word or acronym, and OneLook will search its index of over 900 general and special interest dictionaries for the definition.

Oxford Dictionaries 

This resource offers over 350,000 definitions from various Oxford dictionaries covering US, British, and worldwide English. Also includes more than 600,000 thesaurus entries.

Oxford English Dictionary 

The definitive record of the English language. Chronological examples of usage make it especially good for researching the historical development of words.

Oxford Language Dictionaries

Oxford's high-quality bilingual language reference content in an expanding range of languages. Now including Chinese, French, German, Italian, Russian, and Spanish.

Specialty Dictionaries 

Provides a variety of links to specialized subject dictionaries in many different areas.


A graphical dictionary/thesaurus that allows you to see the relations between words, concepts, and associations.

An online project that gives as much information as possible for words, such as images, statistics, pronunciations, and multiple definitions.