DEFINITIONS OF PERMACULTURE:

Permaculture is a philosophy of working with, rather than against nature; of protracted & thoughtful observation rather than protracted & thoughtless action; of looking at systems in all their functions rather than asking only one yield of them & of allowing systems to demonstrate their own evolutions.
-Bill Mollison

Permaculture design teaches you to understand and mirror the patterns found in healthy natural environments. You can then build profitable, productive, sustainable, cultivated ecosystems, which include people, and have the diversity, stability, and resilience of natural ecosystems.
-www.permaculture.com/permaculture/index.shtml