WordWeb Online

1. Clear or remove an obstruction from
   "the procedure unblocked his arteries"
    
2. (card game) 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
    
3. Make (assets) available
   "unblock the holdings in the dictator's bank account";
   - unfreeze, free, release

Derived forms: unblocked, unblocking, unblocks

Type of: issue, loosen up, play, supply, unstuff