D defs.my
Entry 2 senses Webster, 1913

Unlock

/ən-läk'/ · Un·lock · IPA /ʌnˈlɑk/
01 v. t. To unfasten, as what is locked; as, to unlock a door or a chest.
  1. 1.
    To unfasten, as what is locked; as, to unlock a door or a chest.
  2. 2.
    To open, in general; to lay open; to undo.
    Unlock your springs, and open all your shades.” Pope.
    “[Lord] unlock the spell of sin.” J. H. Newman.