1. p.a. - Noun
2. p.a. - Adverb
by the year; every year (usually with reference to a sum of money paid or received)
an electronic amplification system used as a communication system in public areas
Source: WordNetI've done so many funny jobs. I worked at a farmer's market through high school. I worked in the stock room of Ralph Lauren. I graduated to salesperson at Ralph Lauren, which was a big deal to me. I've been a P.A. I've been a stand-in. I've been an assistant's assistant. Allison Williams
I play loud onstage for my own benefit as I like. But I'm not too fond of the P.A. either. Kerry King
When you're onstage with an electric band going through a massive P.A. system, it's very artificial. You can't really hear your own voice as it comes out of your mouth. Eric Clapton
he earned $100,000 per annum Source: Internet
we issue six volumes per annum Source: Internet
A man’s voice came over the P.A., telling the zombies he would sue them for ten million dollars if they didn’t cease and desist… Source: Internet