Definition of "blocking"

blocking

verb
1. present participle and gerund of block
noun
countable and uncountable, plural blockings
1. The act by which something is blocked; an obstruction.
  Quotations
  Miss H.'s voice was clear and intelligible, although it alternated between vocal blockings and extreme vocal hurry, every clause being jetted out suddenly, and rapidly decaying into aphonia.
  1973, Oliver Sacks, Awakenings
2. The precise movement and positioning of actors in order to facilitate a performance (originally planned using miniature blocks).
3. Blocks used to support (a building, etc.) temporarily.
4. (computing) A feature that prevents a keyboard from registering multiple simultaneous keypresses that would cause ghosting.
  Quotations
  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, John St. Clair, Project Arcade: Build Your Own Arcade Machine, page 218