noun

• A substantial, often approximately cuboid, piece of any substance.
• A substantial, often approximately cuboid, piece of any substance.
• A substantial, often approximately cuboid, piece of any substance.
  "But there are many queen bee configurations in which the debris is neutralized, including placement of a block or eater near the bee's turnaround point, or placing two queen bees in a line or at right angles in various positions and phases."
• A physical area or extent of something, often rectangular or approximately rectangular.

verb

• (transitive) To fill or obstruct (something) so that it is not possible to pass.
  "The pipe was blocked by leaves."
• (transitive) To prevent (something or someone) from passing.
  "A broken-down car is blocking the traffic."
• (transitive) To prevent (something from happening or someone from doing something).
  "His plan to take over the business was blocked by the boss."
• (transitive, sports) To impede (an opponent or opponent’s play).
  "He blocked the basketball player’s shot."