'Self-defense' definitions:

Definition of 'self-defense'

From: WordNet
noun
The act of defending yourself [syn: self-defense, self- defence, self-protection]

Definition of 'Self-defense'

From: GCIDE
  • Self-defense \Self`-de*fense"\, n. The act of defending one's own person, property, or reputation. [1913 Webster]
  • In self-defense (Law), in protection of self, -- it being permitted in law to a party on whom a grave wrong is attempted to resist the wrong, even at the peril of the life of the assailiant. --Wharton. [1913 Webster]

Synonyms of 'self-defense'

From: Moby Thesaurus