Pronunciation: (un-lok'), [key]
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.
to become unlocked.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.