Definition of

Pa

  1. (noun, artifact) an electronic amplification system used as a communication system in public areas
  2. (noun, location) a Mid-Atlantic state; one of the original 13 colonies
  3. (noun, person) an informal term for a father; probably derived from baby talk
  4. (noun, quantity) a unit of pressure equal to one newton per square meter
  5. (noun, substance) a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead

via WordNet, Princeton University

Origin of the word Pa

  1. 1811, colloquial shortening of papa (q.v.). more

via Online Etymology Dictionary, ©2001 Douglas Harper

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