Permaculture is the science and art of integrating and connecting indigenous resources with available appropriate technology to mimic natural processes. Doing so, we take care of the Earth and promote sustainable living.
              - 
Camilo O'Kuinghttons

That's one definition. There have been many wise and creative interpretations and observations made by people practicing permaculture principles. Check out the following (listed by author):

Have a recommendation for a definition to be included here? Send it to us via email and we'll consider it.