pa

noun

1. 1

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

2. 2

   a unit of pressure equal to one newton per square meter

3. 3

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

4. 4

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

5. 5

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