1. power system a system of high tension cables by which electrical power is distributed throughout a region
  2. preciosity the quality of being fastidious or excessively refined
  3. precipitate bring about abruptly
  4. persistent stubbornly unyielding
  5. precise sharply exact or accurate or delimited
  6. ecosystem organisms interacting with their physical environment
  7. appreciate be fully aware of; realize fully
  8. precision the quality of being exact
  9. persist refuse to stop
  10. presidium a permanent executive committee in socialist countries that has all the powers of some larger legislative body and that acts for it when it is not in session
  11. persist in do something repeatedly and showing no intention to stop
  12. press stud a fastener used on clothing; fastens with a snapping sound
  13. precede be earlier in time
  14. persistence continuing or repeating behavior
  15. processed subjected to a special treatment
  16. precipitous extremely steep
  17. precisely in a sharply exact manner
  18. P.A. system an electronic amplification system used as a communication system in public areas
  19. PA system an electronic amplification system used as a communication system in public areas
  20. precedent an example that is used to justify similar occurrences