- 1unlock something to undo the lock of a door, window, etc., using a key to unlock the door opposite lock
- 2 unlock something to discover something and let it be known The divers hoped to unlock some of the secrets of the ocean. Drama helps to unlock young people's creative talents.
NAmE//ʌnˈlɑk//Verb Forms present simple I / you / we / they unlock
he / she / it unlocks
past simple unlocked
-ing form unlocking