History
- The Britannia Lexicon of Medieval History
- Castle Terminology
- Encyclopedia of Marxism (glossaries)
- Encyclopedia of Women's History
- Mayhew and Skeat Concise Dictionary of Middle English
- Glossary of the Natural History of Nova Scotia
- Glossary of Medieval Towns
- A List of Medieval Legal Terms
- Middle English: Search of U. of Virginia Collections
- Pimbly's Dictionary of Heraldry
- See also Shakespeare
Humor
- Buzzwhack Buzzword Dictionary
- Cat Dictionary
- The Dialectizer
- Ambrose Bierce's The Devil's Dictionary
- The Devil's Dictionary
- The Devil's Dictionary (Erik M. Francis)
- The Devil's Dictionary (Denys Duchier)
- The Devil's Dictionary
- The Devil's Dictionary
- The Devil's Environmental Dictionary
- The Foolish Dictionary
- A Glossary of Quaint Southernisms
- Hyperglossary of American English Hacker Theocratese
- The Unofficial Smiley List
- The Really Really Unofficial Smiley List
- A Short Dictionary of Construction Terms
Hunting
Insurance (Assurance)
- Commercial Insurance Glossary
- Elsevier's Dictionary of Export Financing and Credit Insurance (Book)
- Elsevier's Dictionary of Export Financing and Credit Insurance(CD-ROM)
- Elsevier's Dictionary of Insurance and Risk Prevention (Book)
- Glossary of General Insurance Terms
- The Complete Glossary of Insurance Coverage Explanations
- Glossary of Legal Insurance Terms
- Glossary of Insurance Terms
- The Complete Glossary of Insurance Coverage Explanations
- Glossary of Insurance and Financial Terms
- Glossary of Liability Insurance Terms
- Glossary of Workers Compensation Insurance Terms
- Lloyd's List of Insurance Terms
- Rupp's Insurance + Risk Management Glossary
- David G. Sayles Dictionary of Insurance Terms (currently down for repairs)
- Glossary of Insurance Coverage Explanations
- Life & Health Insurance Glossary
Internet
- Chat Room Abbreviations and Acronyms
- International Domain Names
- Emoticons Explained
- BBC Glossary of Web Terminology
- Computer Network Glossary
- Education World Internet Glossary
- Glossary of Internet Terms
- Netdictionary: Guide to terms related to the Internet
- ILC Glossary of Internet Terms
- Internet Terms
- Netlingo Internet Language Dictionary
- Search Engine Terms
- Technology Glossary plus index of others
- Tech Encyclopedia (over 10,000 technology terms and definitions)
- Web Dictionary of Cybernetics and Systems
- Virus Glossary
- What?is.com: Internet, web design, file formats, and more
- PC Webopædia Personal Computer Dictionary
- The ZDWebopædia
- See also Computing
- See also Multilingual Dictionaries
Investment
- A Quadralingual Glossary on Derivative Instruments (English, French, German, Italian)
- Glossary of Futures Terminology (Chicago Board of Trade)
- Glossary of Stock Investing Terms
- Investopedia
- Investor Words: On-line Glossary of Investment Terminology
- Investor's Dictionary
- The Traders' Glossary© of technical terms and topics
Labor Relations
- Dictionary of Occupational Titles
- Dictionary of Occupations
- Dictionary of Occupational Titles
- Glossary of Federal Sector Labor-Management Relations Terms
- List of Bargaining Terms
- Labor and Legal Terminology
- Labor Relations Glossary (ACSS)
- A Short List of Labor Relation Terms
Law
Law Enforcement
Leather
- Footwear Glossary
- Glossary of Leather (Great Britain)
- Glossary of the History of Shoemaking
- See also Multilingual Dictionaries
- Leather Glossary
Library
- Glossary of Common Library Terms
- Glossary of Library Terms
- The Library of Congress alpha-3 language codes for the representation of names of languages
- Elsevier's Dictionary of Library Science, Information & Documentation (Book)
Linguistics
- Dictionary of English Usage
- Dictionary of Phonasthemes
- A Glossary of Translation and Interpreting Terminology
- Linguistic Glossary (Summer Institute of Linguistics)
Literature
- Dictionary of Phrase and Fable by E. Cobham Brewer (1894)
- Dictionary of Symbolism
- A (William) Faulkner Glossary of Persons, Places, and Things in his Work
- Glossary of the Greco-Roman World
- A List of Literary Terms
- See also Shakespeare
Magic and Sorcery
Marketing
- MarcommWise Marketing Glossary
- List of Marketing Terms
- Online Marketing Dictionary
- See also Multilingual Dictionaries
Mathematics
- Elsevier's Dictionary of Computer Science and Mathematics (Book)
- Elsevier's Dictionary of Computer Science and Mathematics (CD-ROM)
- Glossary of Mathematics
- Historical Dictionary of Mathematical Terms
- LogisticsWorld Logistics Glossary
- Mathematical Programming Glossary
- See also Mathematics
- See also Multilingual Dictionaries
Measures
- Measurement Converters
- Dictionary of Measures and Units
- Dictionary of Units of Measurement
- Elsevier's Dictionary of Measurement and Control (Book)
Media
Medicine
- The Medlingua Project
Doctors: Communicate with your heterolingual patients! - Multilingual Glossary of Medical Terms
- ABTA Glossary for Brain Tumor Patients
- Breast Cancer Dictionary
- Breast Cancer Wordlist
- Cancer Glossary
- CancerNet Dictionary of Cancer Terms
- NIH Comprehensive Glossary of Cancer-related Terms
- National Center for Biotechnology Information Taxonomy Database
- Glossary of Genetic Terms
- A Genetics Glossary
- Glossary of the Science of Genetics
- Human Genome Project Glossary
- A Hypermedia Glossary of Genetic Terms
- Abbreviated Medical Dictionary
- British Health and Social Services Abbreviation Glossary
- Children's Health and Wellness Glossary
- Allergy Glossary: The Respiratory System
- CHORUS: Collaborative Hypertext of Radiology
- Department of Defense Glossary of Health Care
- Diabetes Dictionary
- A Dictionary of Alternative-Medicine Methods
- Dictionary of English Medical Terms
- Emergency Medicine (large listing of general terms)
- Genomics Glossaries (work in progress)
- Glossary of Archaic Medical Terms
- Glossary of Histological and Micro-Anatomical Terms
- Glossary of Terms for Bone Marrow Transplant
- Glossary of Vision Research
- Hepatitis (Liver Disease) Glossary
- HON Dictionary of Food Intolerance
- The Internet Drug Index
- Laser Eye Surgery Vocabulary
- Leukemia and Bone Marrow Transplant Glossary
- MedicineNet Medical Dictionary
- Medical Acronyms of the UK
- Medline On-line Medical Dictionary (British)
- Merck Home Medical Manual On-Line
- Multiple Sclerosis Terms
- Sex Therapy Glossary
- Vocabulary of Trauma
- Wheeless' Textbook of OrthOrthopedics
- Wordlist of Medical and Scientific Terms Related to Chronic Fatigue Syndrome
- Wordlist of Pathology
- Parkinson's Disease Glossary
- WeMove Glossary of Terms
- Glossary Of Parkinson's Disease Drug Treatment
- Pharmaceuticals Medical Dictionary Indexes
- See also Biology
- See also Science
- See also Multilingual Dictionaries
Aids Terminology
Cancer Terminology
Metallurgy
- Elsevier's Dictionary of Metallurgy and Metal Working (CD-ROM)
- Glossary of Metal Terminology
- Glossary of Steel Terms and Concepts
- Glossary of Terms used in the Silver Trade
- Infomine Mining Dictionary
- The Principal Metals Searchable Glossary (1,000+ terms)
- US Steel List of Sheet Products
Meteorology
- Elsevier's Dictionary of Climatology and Meteorology (Book)
- Elsevier's Dictionary of Climatology and Meteorology (CD-ROM)
- Hopkins Glossary of Weather Terms
- WashingtonPost.com Weather Glossary
- See also Geology
Military
- DOD Dictionary of Military Terms
- DANFS Online: Dictionary of American Naval Fighting Ships
- List of Common Military Acronyms
- U.S. Government and Military Acronyms
- Space and Electronic Warfare Lexicon
- World War II German-English Military Glossary