#1
pa n. [
dad, dada, daddy, papa, pappa, pop] an informal term for a father; probably derived from baby talk
. wn #2
pa n. [
protactinium, protoactinium, Pa, atomic number 91] a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead
. wn #3
pa n. [
pascal, Pa] a unit of pressure equal to one newton per square meter
. wn #4
pa n. [
Pennsylvania, Keystone State, PA] a Mid-Atlantic state; one of the original 13 colonies
. wn #5
pa n. [
public address system, P.A. system, PA system, P.A., PA] an electronic amplification system used as a communication system in public areas
. wn