To remove one or more logical records (units of stored information) from a block. Application or database systems must often deblock information to make specific units of information available for processing. Compare block2 (definition 1).

1. To in card games: 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.
2. To make available, as of assets; or free for sale or publication; SYN. unfreeze, free, release.