| 1. | to undo the lock of (a door, chest, etc.), esp. with a key. |
| 2. | to open or release by or as if by undoing a lock. |
| 3. | to open (anything firmly closed or joined): to unlock the jaws. |
| 4. | to lay open; disclose: to unlock the secrets of one's heart. |
| 5. | to become unlocked. |