What does PI stand for?

The list of PI abbreviation meanings.

Stands For|1.1kAbbreviated As|0Related|0

1,190 entry under topic. ×

124
Principal Investigator(Celestial objects, Astronomy, Army)
1
Photographic Interpretation(Army, Military)
1
Practice Interception(Royal military, Armed Forces, Air Force)
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APASmart Define. (2018). pi. Retrieved September 23, 2026, from http://smartdefine.org/pi/abbreviations/f/army
ChicagoSmart Define. 2018. "pi" http://smartdefine.org/pi/abbreviations/f/army (accessed September 23, 2026).
HarvardSmart Define 2018, pi, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/pi/abbreviations/f/army>.
MLASmart Define. "pi" 2 February 2018. Web. 23 September 2026. <http://smartdefine.org/pi/abbreviations/f/army>