In screen printing, any material, such as paper, film, tissue, glue, lacquer, or a photographically made stencil, that is applied to the screen fabric to prevent the penetration of ink. See also Knife [..]

A specially formulated paint or coating for use on electric signs to block light emission where needed, for example between letters in a neon sign. It adheres well to glass, and resists weather, heat [..]

The physical prevention of the operation of equipment.

Player blocks (or boxes) out an opposing player. This requires contact.