Blocking

To fill (something) so that it is not possible to pass.

"The pipe is blocked."

To prevent (something or someone) from passing.

"You're blocking the road – I can't get through!"

To prevent (something from happening or someone from doing something).

"His plan to take over the business was blocked by the boss."

To impede an opponent.

"He blocked the basketball player's shot."

The act by which something is blocked; an obstruction.

"blocking of major opposition sites"

The precise movement and positioning of actors on a stage in order to facilitate the performance of a play, ballet, film or opera (originally planned using miniature blocks).

Blocks used to support (a building, etc.) temporarily.

A feature that prevents a keyboard from registering multiple simultaneous keypresses that would cause ghosting.