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 Definitions of 'p.a.':

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1. (noun) public address system, P.A. system, PA system, P.A., PA
an electronic amplification system used as a communication system in public areas


2. (noun) dad, dada, daddy, pa, papa, pappa, pop
an informal term for a father; probably derived from baby talk


3. (noun) protactinium, protoactinium, Pa, atomic number 91
a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead


4. (noun) pascal, Pa
a unit of pressure equal to one newton per square meter


5. (noun) Pennsylvania, Keystone State, PA
a Mid-Atlantic state; one of the original 13 colonies



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"p.a.." Definitions.net. STANDS4 LLC, 2008. 5 July. 2008. http://www.definitions.net/definition/p.a.
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