[1] : The Collaborative International Dictionary of English v.0.48

feudal \feu"dal\ f=u"dal, a. f. f'eodal, or ll.
   feudalis.
   1. of or pertaining to feuds, fiefs, or fees; as, feudal
      rights or services; feudal tenures.
      1913 webster

   2. consisting of, or founded upon, feuds or fiefs; embracing
      tenures by military services; as, the feudal system.
      1913 webster

[2] : WordNet (r) 2.0

feudal
     adj : of or relating to or characteristic of feudalism syn: feudalistic
see also:
feudalistic 

[3] : Moby Thesaurus II by Grady Ward, 1.0

50 moby thesaurus words for "feudal":
   absolute, absolutist, absolutistic, arbitrary, aristocratic,
   arrogant, authoritarian, authoritative, autocratic, bossy, client,
   dependent, despotic, dictatorial, domineering, feodal, feudatory,
   grinding, high-handed, imperative, imperial, imperious, inferior,
   liege, lordly, magisterial, magistral, manorial, masterful,
   monocratic, oppressive, overbearing, overruling, peremptory,
   praedial, real, repressive, seigneurial, seignioral, servile,
   severe, strict, subject, subordinate, subservient, suppressive,
   tributary, tyrannical, tyrannous, vassal

[4] : Bouvier's Law Dictionary, Revised 6th Ed (1856)

feudal. a term applied to whatever concerned a feud; as feudal law: feudal 
rights. 

Feudal >> F Words
Feudal, definition of term: Feudal
feudal_pag1.html

Feudal System >> F Words
Feudal System, definition of term: Feudal System
feudal+system_pag1.html

Feudal Lord >> F Words
Feudal Lord, definition of term: Feudal Lord
feudal+lord_pag1.html