noun
- An informal term for a father; probably derived from baby talk.
- A short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead.
- synonyms: protactinium, protoactinium, atomic number 91
- A unit of pressure equal to one newton per square meter.
- synonyms: pascal
- A Mid-Atlantic state; one of the original 13 colonies.
- synonyms: Pennsylvania, Keystone State
- An electronic amplification system used as a communication system in public areas.
- synonyms: public address system, P. A. System, PA system, P. A.
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). PA. Retrieved September 20, 2026, from http://smartdefine.org/pa/definitions/1299939 |
| Chicago | WordNet. 2010. "PA" http://smartdefine.org/pa/definitions/1299939 (accessed September 20, 2026). |
| Harvard | WordNet 2010, PA, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/pa/definitions/1299939>. |
| MLA | WordNet. "PA" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/pa/definitions/1299939> |