block

shaped mass
a restriction on accessing an online resource, enforced through technical means
defensive tactic in chess in response to an attack, consisting of interposing a piece between the opponent's attacking piece and the piece being attacked
sailing term; single or multiple pulley
sequence of bytes or bits, having a nominal length (a block size)
in basketball, the action of a defensive player legally deflecting a field goal attempt from an offensive player to prevent a score
one length between city streets
act or process of halting or preventing