Usually means: Parapsychological phenomena involving mind interactions.
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We found 47 dictionaries that define the word psi:

General (18 matching dictionaries)
  1. psi: Merriam-Webster
  2. Psi, p.s.i, psi: Oxford Learner's Dictionaries
  3. psi, psi, psi: American Heritage Dictionary of the English Language
  4. psi: Collins English Dictionary
  5. psi: Vocabulary.com
  6. Psi, psi: Wordnik
  7. PSI, psi: Wiktionary
  8. psi: Webster's New World College Dictionary, 4th Ed.
  9. psi: The Wordsmyth English Dictionary-Thesaurus
  10. psi: Infoplease Dictionary
  11. p.s.i, psi: Dictionary.com
  12. PSI (album), PSI (computational chemistry), PSI, Psi (Brazilian TV series), Psi (Cyrillic), Psi (Greek), Psi (TV series), Psi (comics), Psi (disambiguation), Psi (instant messaging client), Psi (instant messenger), Psi (letter), Psi (parapsychology), Psi: Wikipedia, the Free Encyclopedia
  13. psi: Rhymezone
  14. PSI, psi: Stammtisch Beau Fleuve Acronyms
  15. psi: FreeDictionary.org
  16. psi: Mnemonic Dictionary
  17. psi: TheFreeDictionary.com
  18. psi: Wikimedia Commons US English Pronunciations

Art (1 matching dictionary)
  1. Glossary of Stamp Collecting Terms (No longer online)

Business (2 matching dictionaries)
  1. Construction Term Glossary (No longer online)
  2. Glossary of Trucking Terms (No longer online)

Computing (2 matching dictionaries)
  1. PSI: Free On-line Dictionary of Computing
  2. psi: Encyclopedia

Medicine (5 matching dictionaries)
  1. psi: Merriam-Webster Medical Dictionary
  2. Dorland's Illustrated Medical Dictionary (No longer online)
  3. online medical dictionary (No longer online)
  4. Hepatitis C Information Central (No longer online)
  5. p.s.i, p.s.i, psi: Medical dictionary

Miscellaneous (5 matching dictionaries)
  1. PSI: Acronym Finder
  2. Psi: Glossary of Terms in Parapsychology
  3. PSI: Three Letter Words with definitions
  4. psi: The Skeptic's Dictionary
  5. AbbreviationZ (No longer online)

Science (2 matching dictionaries)
  1. PSI: Material Safety Data Sheets HyperGlossary
  2. PSI: Extragalactic Astronomy

Slang (1 matching dictionary)
  1. P.S.I. (Private Stripper Information), PSI: Urban Dictionary

Sports (1 matching dictionary)
  1. PSI (Pounds/Square Inch): Bicycle Glossary

Tech (10 matching dictionaries)
  1. PSI: GEOGRAPHIC INFORMATION SYSTEMS, CARTOGRAPHY, AND REMOTE SENSING
  2. AUTOMOTIVE TERMS (No longer online)
  3. DOD Dictionary of Military Terms: Joint Acronyms and Abbreviations (No longer online)
  4. Glossary of Meteorology (No longer online)
  5. Glossary of Common Hearth and Heating Terms (No longer online)
  6. The Stamp Store Glossary (concrete) (No longer online)
  7. Glossary of Landscape Irrigation Terms (No longer online)
  8. Oil Analysis (No longer online)
  9. Glossary of Energy Terms (No longer online)
  10. PSI: Power Engineering

(Note: See psis as well.)

Definitions from Wiktionary (PSI)

noun:  (countable) The twenty-third letter of Classical and Modern Greek and the twenty-fifth letter of Old and Ancient Greek.
noun:  (uncountable, parapsychology, science fiction) A form of psychic energy.
noun:  Initialism of pre-sentence investigation.
noun:  Initialism of protein structure initiative.
noun:  Initialism of pollutant safety/standard index (measurement of the air pollutant such as haze)
noun:  (UK politics) Initialism of Policy Studies Institute, a British think tank.

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    indigo,     violet,     lavender,     purple,     lilac, more...



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