blocking

noun5

1. •
   The act by which something is blocked; an obstruction.

   • blocking of major opposition sites
2. •
   The precise movement and positioning of actors in order to facilitate a performance (originally planned using miniature blocks).
3. •
   A rectangular discontinuity as an artifact of separating a discrete signal into blocks that are processed individually.

   • Blocking is an annoying effect in image compression using JPEG especially at low bit-rates. — 2017
4. •
   Blocks used to support (a building, etc.) temporarily.
5. •
   A feature that prevents a keyboard from registering multiple simultaneous keypresses that would cause ghosting.

   • Examine your matrix map, and make sure that no three keystrokes form a rectangle with a fourth keystroke that will cause you problems. This prevents both ghosting and blocking. — 2011