'Liberator' definitions:

Definition of 'liberator'

From: WordNet
noun
Someone who releases people from captivity or bondage [ant: captor, capturer]

Definition of 'Liberator'

From: GCIDE
  • Liberator \Lib"er*a`tor\ (l[i^]b"[~e]r*[=a]`t[~e]r), n. [L.] One who, or that which, liberates; a deliverer. [1913 Webster]