Synonym: Keystone State, P.A., P.A. system, PA, PA system, Pa, Pennsylvania, atomic number 91, dad, dada, daddy, papa, pappa, pascal, pop, protactinium, protoactinium, public address system. Meaning: [pɑː] 
n. 1. an informal term for a father; probably derived from baby talk 2. a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead 3. a unit of pressure equal to one newton per square meter 4. a Mid-Atlantic state; one of the original 13 colonies 5. an electronic amplification system used as a communication system in public areas.
n. 1. an informal term for a father; probably derived from baby talk 2. a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead 3. a unit of pressure equal to one newton per square meter 4. a Mid-Atlantic state; one of the original 13 colonies 5. an electronic amplification system used as a communication system in public areas. 
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31. He once had the impossible job of being PA to Ted Heath in sulphurous exile.
32. Based in King of Prussia, Pa., Centeon consists of the existing blood-plasma divisions from both parent companies.
33. There was a hiss over the PA, followed by the chirruping of recorded birdsong.
34. The apothecary came in his pony and trap just before Pa got home.
35. But, strange to say, Lotus's PA system sounded just as loud.
36. The songs are allowed a life of their own and, dodgy PA permitting, it works splendidly.
37. Copies are available by subscription, price ￡104 pa, from Health and safety monitor.
38. Aldrich Ames is serving a life sentence at the federal penitentiary at Allenwood, Pa..
39. I am helping my Pa with the outdoor work, as is right and proper.
40. The'll pa me half cent per tile in cash.
41. " Don't interfere , pa,'said Blacky.
42. PA System, music, setup and breakdown are provided.
43. Am I pa ionate about my product or service?
44. "Pa," he said, "I don't feel well.".
45. " In the name of Heaven, Pa, three thousand!
46. " How could it make me tipsy, Pa?
47. Pa gave him a good talking-to in the evening.
48. Pa, I wish you wouldn't shout.
49. Elvis comes on the coffee shop PA system.
50. Uncle, pa wants to see you.
51. What did Wade Hampton ever do for Pa?
52. To solve the problem of calibration transfer in multivariate calibration of chemometrics, Procrustes analysis(PA) algorithm and piecewise direct standardization(PDS) algorithm are applied.
53. Another important point is that pa ionate people are usually those that are thrust into positio of leadership.
54. Nothing but rabbit tobacco. Pa smokes it in a corn cob.
55. A new type of vibrating roller with ungraded amplitude system is discussed in this pa - per.
56. In cities like Pittsburgh, Pa., Indianapolis, Ind., and Chattanooga, Tenn., buying a home is not only a price bargain[sentencedict.com], it could be an excellent investment.
57. For example, a PA system might start with voltages of the order of 0.1 mV from microphones, and boost this to perhaps 10 to 100 V to drive loudspeakers.
58. Please go this way, the pa age over there is blocked by deck cargo.
59. The technology of producing denier PA 6 filament discussed. The details for process is parameters are given.
60. PA(Phthalic Anhydride) branched gelatin can be used as a flocculating agent for the preparation of highly concentrated silver halides photographic emulsions.