Definitions for (noun) pa

Main entry: P.A., P.A. system, PA, PA system, public address system

Definition: an electronic amplification system used as a communication system in public areas


Main entry: PA, Pennsylvania, Keystone State

Definition: a Mid-Atlantic state; one of the original 13 colonies


Main entry: dad, dada, daddy, pop, pa, papa, pappa

Definition: an informal term for a father; probably derived from baby talk


Main entry: Pa, pascal

Definition: a unit of pressure equal to one newton per square meter


Main entry: protactinium, protoactinium, atomic number 91, Pa

Definition: a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead