Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • abbreviation private investigator

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • initialism partial induction (see AI)
  • initialism politically incorrect (See PC)
  • initialism electronics power integrity
  • initialism principal investigator (lead researcher on a grant-funded project)
  • initialism private investigator
  • initialism personal injury
  • initialism Prison Industries (The prison-run work program for inmates)
  • initialism organic chemistry polyimide
  • initialism Philippines, colloquial the Philippines (PI standing for Philippine Islands)
  • abbreviation Piauí, a state of Brazil.

Etymologies

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