/ ˌʌnˈlɒk; NAmE ˌʌnˈlɑːk/ verb [ vn ]
1.
to undo the lock of a door, window, etc., using a key :
to unlock the door
OPP lock
2.
to discover sth and let it be known :
The divers hoped to unlock some of the secrets of the seabed.
/ ˌʌnˈlɒk; NAmE ˌʌnˈlɑːk/ verb [ vn ]
1.
to undo the lock of a door, window, etc., using a key :
to unlock the door
OPP lock
2.
to discover sth and let it be known :
The divers hoped to unlock some of the secrets of the seabed.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005