1remove an obstruction from (something, especially a pipe or drain):a gadget to unblock sinks quickly
2restore access to or the use of (email or a website or mobile phone):crooks are using software to unblock the phones so they can be resold
3 Bridge play in such a way that (a long suit) becomes established: (as adjective unblocking)this unblocking play was identified by a Viennese whist player
Derivatives
unblocker
noun
unblock in other Oxford dictionaries
Definition of unblock in the US English dictionary
