The act of unlocking something.
(transitive) To undo or open a lock or something locked by, for example, turning a key, or selecting a combination.
(transitive) To obtain access to something; to meet the requirements of a security or protection system.
(transitive, mobile telephony) To configure (a mobile phone) so that it is not bound to any particular carrier.
(transitive) To disclose or reveal previously unknown knowledge or potential.
(intransitive) To be or become unfastened or unrestrained.
(figurative) To make available.
To undermine something that has control over a situation; to find a way to counter or oppose.