(verb) open the lock of. Synonyms: unlock. Example:"Unlock the door."
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Verb Definition 1
(verb) set free or release. Synonyms: unlock.
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Verb Definition 2
(verb) become unlocked. Synonyms: unlock. Example:"The door unlocked from the inside."
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Verb Definition 3
(adj) not firmly fastened or secured. Synonyms: unbarred, unbolted, unlatched, unsecured. Examples:"An unbarred door.""Went through the unlatched gate into the street.""An unlocked room."