1. noun /blɒk,blɑk/
a) A substantial, often approximately cuboid, piece of any substance.
A block of ice.
b) A cuboid of wood, plastic or other material used as a base on which to cut something.
A block of stone.
See Also: bloc
2. verb /blɒk,blɑk/
a) To fill (something) so that it is not possible to pass.
The pipe is blocked.
b) To prevent (something or someone) from passing.
Youre blocking the road - I cant get through.
Wikipedia foundation.