part of an internal combustion engine Block (sailing), a single or multiple pulley used on sailboats Medicine Nerve block, or regional nerve blockade, any deliberate interruption of signals traveling along a nerve, often for the purpose of pain relief Local anesthetic nerve block (sometimes referred to as simply "nerve block"), a short-term block Nerve block, the deliberate temporary degeneration of nerve fibers to produce a block that may persist for weeks, months, or indefinitely Neurectomy, the cutting through or removal of a nerve or a section of a nerve, which usually produces a permanent block Third-degree atrioventricular block (AV block), a medical condition Mathematics Block (permutation group theory) Block, in modular representation theory Block, in graph theory, is a biconnected component, a maximal biconnected subgraph of a graph Aschbacher block of a finite group Block design, a kind of set system in combinatorial mathematics Block matrix Block of a ring, a centrally primitive idempotent or the ideal it generates Sports Block, a defensive shot in pickleball Block (basketball), when a defensive player legally deflects a shot Blocking (martial arts) Starting blocks, devices used by sprinters to assist in preventing their feet from slipping as they break into a run Block (cricket), when a batsman deflects the ball to avoid getting out The Block (basketball), a defensive play in game 7 of the 2016 NBA Finals Transportation Block number, a system to differentiate between groups of aircraft of the same type with minor variants Signalling block system, a way of controlling train movement People Block (musician) (Jamie Block), an anti-folk musician based in New York, US Other uses Block letters (also known as printscript, manuscript, print writing, or ball and stick in academics), a sans-serif (or "Gothic") style of writing Block party (also known as street party), a community social event Block scheduling, a type of academic scheduling Hat block, or block shaper, a wooden block carved into the shape of a hat by a craftsman Postage stamp block, an attached group of postage stamps See also Block House (disambiguation) Block Party (disambiguation) The Block (disambiguation) Blockbuster (disambiguation) Blockhead (disambiguation) Bloc (disambiguation) Blockade (disambiguation) Blockbuster (disambiguation) Blocker (disambiguation) Blocking (disambiguation)