block

A chopping block: a cuboid base for cutting or beheading.

A wig block: a simplified head model upon which wigs are worn.

A mould on which hats, bonnets, etc., are shaped.

(printing, dated) A piece of hard wood on which a stereotype or electrotype plate is mounted.

A case or frame housing one or more sheaves (pulleys), used with ropes to increase or redirect force, for example as part of lifting gear or a sailing ship's rigging. See also block and tackle.

A section of split logs used as fuel.

A set of sheets (of paper) joined together at one end, forming a cuboid shape.

(falconry) The perch on which a bird of prey is kept.

(philately) A joined group of four (or in some cases nine) postage stamps, forming a roughly square shape.

(viticulture) A discrete group of vines in a vineyard, often distinguished from others by variety, clone, canopy training method, irrigation infrastructure, or some combination thereof.

(computing) A logical data storage unit containing one or more physical sectors (see cluster).

(programming) A region of code in a program that acts as a single unit, such as a function or loop.

(cryptography) A fixed-length group of bits making up part of a message.

(chemistry) A portion of a macromolecule, comprising many units, that has at least one feature not present in adjacent portions.

(rail transport) A section of a railroad where the block system is used.

(computing) A contiguous range of Unicode code points used to encode characters of a specific type; can be of any size evenly divisible by 16, up to 65,536 (a full plane).

A contiguous group of urban lots of property, typically several acres in extent, not crossed by public streets.

The distance from one street to another in a city or suburb that is built (approximately) to a grid pattern.

A roughly cuboid building.

A cellblock.

Interference or obstruction of cognitive processes.

(sports) An action to interfere with the movement of an opposing player or of the object of play (ball, puck).

A temporary or permanent ban that prevents access to an online account or service, or connection to or from a designated telephone number, IP address, or similar.

(slang) The human head.

(UK) Solitary confinement.

(obsolete) A blockhead; a stupid fellow; a dolt.