'Unleash' definitions:

Definition of 'unleash'

(from WordNet)
verb
Release or vent; "unleash one's anger"
verb
Release from a leash; "unleash the dogs in the park"
verb
Turn loose or free from restraint; "let loose mines"; "Loose terrible plagues upon humanity" [syn: unleash, let loose, loose]

Definition of 'Unleash'

From: GCIDE
  • Unleash \Un*leash"\, v. t. [1st pref. un- + leash.] To free from a leash, or as from a leash; to let go; to release; as, to unleash dogs. [1913 Webster]