to undo the lock of (a door, chest, etc.), esp. with a key.

to open or release by or as if by undoing a lock.

to open (anything firmly closed or joined)

to unlock the jaws.

to lay open; disclose

to unlock the secrets of one's heart.

to become unlocked.

verb

break in , crack , decipher , free , jimmy , liberate , open the door , pop , release , set free , unbolt , unbutton , uncork , undo , unfasten , unhook , unlatch , unravel , unseal , unshut