(1):

(v. t.) To loose, and take off, as a bonnet from a sail, or to cast off, as any lacing in any part of the rigging of a vessel.

(2):

(v. t.) To loose by undoing a lacing; as, to unlace a shoe.

(3):

(v. t.) To loose the dress of; to undress; hence, to expose; to disgrace.