pa

Noun (5)

1. an informal term for a father; probably derived from baby talkSynonyms: daddadadaddypapapappapop
2. a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into leadSynonyms: protactiniumprotoactiniumPaatomic number 91
3. a unit of pressure equal to one newton per square meterSynonyms: pascalPa
4. a Mid-Atlantic state; one of the original 13 coloniesSynonyms: PennsylvaniaKeystone StatePA
5. an electronic amplification system used as a communication system in public areasSynonyms: public address systemP.A. systemPA systemP.A.PA