- p.a.⇄p.a.
1. participial adjective.
2. per annum.
3. public address (system). - P.A.⇄P.A.
an abbreviation for the following:
1. Passenger Agent.
2. personal appearance.
3. physician's assistant.
4. Post Adjutant.
5. power of attorney.
6. Press Agent.
7. Press Association.
8. pu