To free or make available.
To remove or clear a block or obstruction from.
In whist, to throw away a high card so as not to interrupt one's partner's long suit.
To enable communication again, via telephone, instant messaging, etc., with (somebody previously blocked).
The removal of a block or blockage.
To make available.
To undermine something that has control over a situation; to find a way to counter or oppose.
To configure (a mobile phone) so that it is not bound to any particular carrier.
To undo or open a lock or something locked by, for example, turning a key, or selecting a combination.
To obtain access to something; to meet the requirements of a security or protection system.
To disclose or reveal previously unknown knowledge or potential.
To be or become unfastened or unrestrained.
The act of unlocking something.