'Defender' definitions:

Definition of 'defender'

From: WordNet
noun
A person who cares for persons or property [syn: defender, guardian, protector, shielder]
noun
A fighter who holds out against attack [syn: defender, withstander]

Definition of 'Defender'

From: GCIDE
  • Defender \De*fend"er\ (d[-e]*f[e^]nd"[~e]r), n. [Cf. Fender.] One who defends; one who maintains, supports, protects, or vindicates; a champion; an advocate; a vindicator. [1913 Webster]
  • Provinces . . . left without their ancient and puissant defenders. --Motley. [1913 Webster]