PI

See also: Appendix:Variations of "pi"

English

Proper noun

PI

1. Abbreviation of Piauí., a state of Brazil.
2. Initialism of Prison Industries (the prison-run work program for inmates)
3. (colloquial, Philippines) Initialism of Philippine Islands.

   We're going back to the PI for a vacation this summer.

Noun

PI (countable and uncountable, plural PIs)

1. (informatics, SGML, XML) Initialism of processing instruction.
2. Initialism of partial induction (see AI)
3. Initialism of personal injury.
4. Initialism of politically incorrect (see PC)
5. Initialism of principal investigator (lead researcher on a grant-funded project)
6. Initialism of private investigator.
7. (biochemistry) Abbreviation of phosphatidylinositol (a phospholipid component of eukaryotic cell membranes, also abbreviated in PtdIns)
8. (electronics) Initialism of power integrity.
9. (organic chemistry) Initialism of polyimide.
10. Abbreviation of prohibited immigrant.
11. (fan fiction category) Initialism of pseudoincest.

Anagrams

• IP, Ip

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Portuguese

Proper noun

PI

1. Abbreviation of Piauí. (Brazilian state)

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Tagalog

Etymology

Initialism of putang ina

Noun

PI

1. (vulgar) prostitute mother
2. (colloquial, vulgar) a very contemptible person