definition of
[unblock]

[1] #1 unblock v. clear or remove an obstruction from; "the procedure unblocked his arteries". wn

[2] #2 unblock v. play the cards of (a suit) so that the last trick on which a hand can follow suit will be taken by a higher card in the hand of a partner who has the remaining cards of a combined holding. wn

[3] #3 unblock v. [unfreeze, free, release] make (assets) available; "release the holdings in the dictator's bank account". wn