unlock

UK: /ʌnˈlɒk/ US: /ʌnˈlɑk/ ,(un lok′)

WordReference Random House Learner's Dictionary of American English © 2025

un•lock /ʌnˈlɑk/   v. 

1. to undo the lock of: [~ + object]
   to unlock a car; to unlock a door.
   [no object]
   The door unlocks easily.
2. to make open;
   disclose:
   [~ + object] to unlock the secrets of one's heart.

WordReference Random House Unabridged Dictionary of American English © 2025

un•lock  (un lok′), v.t. 

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.

v.i. 

5. to become unlocked.

• 1350–1400; Middle English unloken; see un-², lock¹

un•lock′a•ble, adj. 

Collins Concise English Dictionary © HarperCollins Publishers::

unlock / ʌnˈlɒk/ verb

1. (transitive) to unfasten (a lock, door, etc)
2. (transitive) to open, release, or let loose
3. (transitive) to disclose or provide the key to: unlock a puzzle
4. (intransitive) to become unlocked

unˈlockable adjective