Block may refer to:

• City block, the smallest area surrounded by streets
• Block (subnational entity)
• a method to prevent an Internet user from accessing certain features, such as preventing a certain user from accessing a site, or to prevent unwanted messages from users in e-mail and instant messaging - see blacklist
• A block of Real Estate, the smallest unit of land that can be owned, particularly a Residential Property. This term is most commonly used in Australian English.
• Marine mining law Many countries divide up their exclusive economic zones into "blocks" for sale or leasing to companies to exploit resources under the seabed. Typically these blocks are simply defined on the latitude-longitude grid.
• Railways are divided into blocks guarded by combinations of signals, operating rules, and automatic-control devices so that at most one train may be in a block at any time
• An apartment block or "block of flats"
• A shaped piece of masonry, in the construction industry
• Engine block, the main part of an internal combustion engine
• Postage stamp block, an attached group of postage stamps
• In mathematics, either
  • Block (group theory)
  • Block (graph theory)
• Block (meteorology)
• Block (music), a separate complete unit that is primarily not developed but instead used in various combinations
• Block (programming), forms a subdivision of a program that serves to group related statements, delimit routines, specify storage allocation, delineate the applicability of labels, or segment parts of the program for other purposes
• In data storage either in primary or on secondary storage, grouped data can occur in units known as blocks or buffer. Compare block size (data storage and transmission).
• block (sailing), a pulley or a number of pulleys enclosed in sheaves so as to be fixed to the end of a line or to a spar or surface
• Block (telecommunications)
• block (toy), one of a set of wooden or plastic pieces of various shapes, used as a toy
• Block Arcade, Melbourne
• A numbered block in addresses, described in Address (geography)#Block numbers
• "█", written character

An obstruction, or the act of obstructing:

• block (basketball) occurs when a defensive player legally deflects a shot from an offensive player.
• blocking (American football) occurs when a player obstructs another player's path with his body
• blocking techniques, in the martial arts, techniques which prevent an attack from connecting with your body

Family names:

• Herbert Lawrence Block
• John Rusling Block
• Lawrence Block
• Maurice Block
• Josef Block (1863-1943)

See also

• Block chord
• Block cipher
• Block matrix
• Block size
• Bloch (disambiguation)
• Blok (disambiguation)
• Beheading

Block | ブロック (曖昧さ回避) | Блок