Definitions for unlaceʌnˈleɪs
Random House Webster's College Dictionary
to loosen or undo the lacing or laces of (shoes, a corset, etc.).
untie, unbrace, unlace(verb)
undo the ties of
"They untied the prisoner"
To remove the knot from laces; to undo laces.
Unlace your shoes before taking them off.
to loose by undoing a lacing; as, to unlace a shoe
to loose the dress of; to undress; hence, to expose; to disgrace
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