From Wikipedia, the free encyclopedia.
pa or PA may stand for:
- pa, a word for dad or father ("pa" or "paw")
- Pa, Maori word meaning a fortified village or redoubt, described at length in Maori Wars
- Panama (ISO country code)
- pascal (Pa), SI unit of pressure
- Pennsylvania, the US state
- protactinium (Pa), symbol for the chemical element
- Public Address system amplification equipment
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