Usually means: Prefix meaning "not" or "non".
Definitions Related words Phrases Mentions History
We found 64 dictionaries that define the word IR:

General (26 matching dictionaries)
  1. IR, Ir, ir-: Merriam-Webster
  2. IR, Ir, Ir, ir-: Oxford Learner's Dictionaries
  3. IR, Ir, Ir, ir-, ir-: American Heritage Dictionary of the English Language
  4. Ir, ir, ir-: Collins English Dictionary
  5. IR, Ir: Vocabulary.com
  6. IR, IR, Ir, Ir, i'r, ir, ir, ir, ir, ir, ir, ir-, -iR, iR: Wordnik
  7. ir-: Cambridge Advanced Learner's Dictionary
  8. Ir, ir-: Wiktionary
  9. ir, ir-: Webster's New World College Dictionary, 4th Ed.
  10. Ir, ir-: The Wordsmyth English Dictionary-Thesaurus
  11. IR: Infoplease Dictionary
  12. Ir-, Ir, Ir, .ir, i.r, ir-: Dictionary.com
  13. IR, I.r, Ir (cuneiform), Ir (newspaper), Ir, .ir: Wikipedia, the Free Encyclopedia
  14. Ir-: Online Plain Text English Dictionary
  15. ir-: Webster's Revised Unabridged, 1913 Edition
  16. Ir: Rhymezone
  17. Ir-, ir: AllWords.com Multi-Lingual Dictionary
  18. ir-: MyWord.info
  19. IR, Ir, .ir, i.R: Stammtisch Beau Fleuve Acronyms
  20. ir, ir-: FreeDictionary.org
  21. ir: Mnemonic Dictionary
  22. Ir, Ir, ir-: TheFreeDictionary.com
  23. ir: Longman Dictionary of Contemporary English
  24. Ir: Merriam-Webster

Art (4 matching dictionaries)
  1. IR: ArtLex Lexicon of Visual Art Terminology
  2. ir-: A Cross Reference of Latin and Greek Elements
  3. Glossary of Stamp Collecting Terms (No longer online)
  4. ODLIS: Online Dictionary of Library and Information Science (No longer online)

Business (6 matching dictionaries)
  1. MoneyGlossary.com (No longer online)
  2. Travel Industry Dictionary (No longer online)
  3. IR: Bloomberg Financial Glossary
  4. IR: Investopedia
  5. IR: Financial dictionary
  6. Glossary of Trade and Shipping Terms (No longer online)

Computing (5 matching dictionaries)
  1. IR, ir: Free On-line Dictionary of Computing
  2. IR: CCI Computer
  3. BABEL: Computer Oriented Abbreviations and Acronyms (No longer online)
  4. IR: Computer Telephony & Electronics Dictionary and Glossary
  5. Ir: Encyclopedia

Medicine (4 matching dictionaries)
  1. IR: Merriam-Webster Medical Dictionary
  2. Dorland's Illustrated Medical Dictionary (No longer online)
  3. online medical dictionary (No longer online)
  4. Ir, ir-: Medical dictionary

Miscellaneous (2 matching dictionaries)
  1. IR: Acronym Finder
  2. AbbreviationZ (No longer online)

Religion (1 matching dictionary)
  1. Ir: Smith's Bible Dictionary

Science (5 matching dictionaries)
  1. IR: Extragalactic Astronomy
  2. ir: Cytokines & Cells Online Pathfinder Encyclopaedia
  3. Ir, ir: A Dictionary of Quaternary Acronyms and Abbreviations
  4. Ir: WebElements Periodic Table of the Elements
  5. Atmospheric Chemistry and Air Quality (No longer online)

Slang (1 matching dictionary)
  1. IR: Urban Dictionary

Tech (10 matching dictionaries)
  1. ir: Webster's New World Telecom Dictionary
  2. I.R, IR: GEOGRAPHIC INFORMATION SYSTEMS, CARTOGRAPHY, AND REMOTE SENSING
  3. Basics of Space Flight Glossary (No longer online)
  4. Locksmith Dictionary (No longer online)
  5. DOD Dictionary of Military Terms: Joint Acronyms and Abbreviations (No longer online)
  6. Glossary of Meteorology (No longer online)
  7. Explosives (No longer online)
  8. National Weather Service Glossary (No longer online)
  9. Sweetwater Music (No longer online)
  10. RF Terms Glossary (No longer online)

(Note: See iring as well.)

Definitions from Wiktionary (IR)

noun:  (business) Initialism of industrial relations. [(business, labour) The relationship between management and workers in a given industry.]
noun:  (business) Initialism of investor relations.
noun:  (computer science) Initialism of information retrieval. [(information science) The science of searching for information in documents, searching for documents themselves, searching for metadata which describe documents, or searching within databases, whether relational stand-alone databases or hypertextually-networked databases such as the World Wide Web.]
noun:  (software compilation) Initialism of intermediate representation.
noun:  (physics) Abbreviation of infrared. [(uncountable) The electromagnetic radiation of a wavelength longer than visible light, but shorter than microwave radiation, having a wavelength between 700 nm and 1 mm.]
noun:  (physics) Initialism of infrared radiation. [(physics) Electromagnetic radiation having a wavelength approximately between 1 micrometre and 1 millimetre; perceived as heat.]
noun:  (aviation) Initialism of inertial reference. [(aviation, military) Any of various devices found in airplanes, missiles, satellites, guns, etc. that sense and calculate data such as linear acceleration and turning rate around each axis and which send that data on to other systems.]
noun:  (disability sport) Initialism of indoor rowing. [(parasport) A disabled sport that simulates rowing and sculling using rowing machines linked up to create lanes and boats on an electronic course. Events may be against the clock, stroke count limited, or simulated course distances. Against the clock and stroke count limited disciplines use simulated distances for performance, while simulated course distances uses time of completion for performance.]
noun:  (politics) Initialism of international relations. [The study of political and trade relationships among countries.]
noun:  (law enforcement) Initialism of incident report. [(law enforcement) A commonly used description for law enforcement or help desk events.]
noun:  (pharmacology) Initialism of immediate release.
noun:  (Ohio, rare) Initialism of interstate route.
adjective:  (pornography) Initialism of interracial. [Between or among two or more different races.]

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