Block

Block may refer to:

Administrative subdivisions

A large concrete masonry unit
A solid piece of a hard substance, such as wood, upon which persons are beheaded, e.g.: The charges that led Sir Walter Raleigh to the block in 1618.
Tower block, a high rise multi-unit building
Block (sailing), a single or multiple pulley used on sailboats
Cylinder block, the main part of an internal combustion engine
Toy block, one of a set of wooden or plastic pieces of various shapes
Unit block a type of standardized wooden toy block for children
Freewheel, a set of rear sprockets that attaches to a hub on the rear wheel
Wood block a small piece of slit drum made from a single piece of wood and used as a percussion instrument
Hat block a wooden block carved into the shape of a hat by a craftsman known as a block shaper
Postage stamp block, an attached group of postage stamps

Blocking (American football), when a player obstructs another player's path
Block (basketball), when a defensive player legally deflects a shot
Blocking (martial arts), a defensive technique in the martial arts
Starting blocks, devices used by sprinters to assist in preventing their feet from slipping as they break into a run

Block (data storage), the practice of storing electronic data in equally-sized units
Block-level element in the HTML markup language
Block (telecommunications), a unit of data transmission
Block (programming), a group of declarations and statements treated as a unit
Block (Internet), technical measures to restrict users' access to certain internet resources
Boom Blox, a 2008 video game for the Wii console from EA, previously known as Blocks
Blocks (C language extension), an extension to the C programming language designed to support parallel programming
Non-blocking (disambiguation), for computers running multiple programs at once, it is important for no single task waiting for completion of an operation to indefinitely block the processing of any other task
Unicode block, a named range of codepoints in Unicode
Block elements, a class of Box-drawing characters
Block Number (aircraft), a method of differentiating between groups of aircraft of the same type that have minor modifications

Aschbacher block of a finite group
Block design, a kind of set system in combinatorial mathematics
Block (permutation group theory)
Block of a ring, a centrally primitive idempotent or the ideal it generates
Block in modular representation theory
In graph theory, a maximally 2-connected subgraph or a bridge with its endvertices
Blocks are the elements of a block matrix

Block Entertainment, a record label
Blocks Recording Club, a record label
Block musical form
Wood block, a small piece of slit drum made from a single piece of wood and used as a percussion instrument

Francesca Lia Block (born 1962), American writer
Herbert Lawrence Block, commonly known as Herblock, American political cartoonist
Lawrence Block (born 1938), American crime writer
Malú Block (1904–1989), born María Luisa Cabrera, Mexican artist
Mark Block, American political strategist
Walter Block (born 1941), American economist, author