Definition of "feudal"

And the birth of nations implies many artifices: Not only are they constituted in an active struggle against the imperial or evolved systems, the feudal systems, and the autonomous cities, but they crush their own "minorities," in other words, minoritarian phenomena that could be termed "nationalitarian," which work from within and if need be turn to the old codes to find a greater degree of freedom.

1987, Deleuze & Guattari, A Thousand Plateaus, page 456