Usually means: Strategic Defense Initiative, missile defense system.
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We found 26 dictionaries that define the word SDI:

General (14 matching dictionaries)
  1. SDI, SDI: Merriam-Webster.com
  2. SDI: Oxford Learner's Dictionaries
  3. SDI: American Heritage Dictionary of the English Language
  4. SDI: Collins English Dictionary
  5. sdi: Wordnik
  6. SDI, sdi: Cambridge Advanced Learner's Dictionary
  7. SDI: Wiktionary
  8. SDI: Webster's New World College Dictionary, 4th Ed.
  9. SDI: The Wordsmyth English Dictionary-Thesaurus
  10. SDI: Infoplease Dictionary
  11. SDI: Dictionary.com
  12. S.D.I. (computer game), SDI (arcade game), SDI (engine), SDI, Sdi: Wikipedia, the Free Encyclopedia
  13. SDI: Stammtisch Beau Fleuve Acronyms
  14. SDI: Dictionary/thesaurus

Art (1 matching dictionary)
  1. ODLIS: Online Dictionary of Library and Information Science (No longer online)

Business (1 matching dictionary)
  1. Construction Term Glossary (No longer online)

Computing (4 matching dictionaries)
  1. SDI: Free On-line Dictionary of Computing
  2. Technology Terms and Acronyms (No longer online)
  3. BABEL: Computer Oriented Abbreviations and Acronyms (No longer online)
  4. SDI: Encyclopedia

Medicine (1 matching dictionary)
  1. online medical dictionary (No longer online)

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

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

Tech (2 matching dictionaries)
  1. SDI: GEOGRAPHIC INFORMATION SYSTEMS, CARTOGRAPHY, AND REMOTE SENSING
  2. AUTOMOTIVE TERMS (No longer online)

Definitions from Wiktionary (SDI)

noun:  (graphical user interface) Initialism of single-document interface.
noun:  Initialism of Strategic Defense Initiative. [(historical) A system proposed by U.S. President Ronald Reagan on March 23, 1983, to use ground-based and space-based systems to protect the United States from attack by strategic nuclear ballistic missiles.]
noun:  Initialism of Steel Deck Institute.
noun:  (sports) Initialism of Scuba Diving International.

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ids

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ids

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