A substantial, often approximately cuboid, piece of any substance. • 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. • 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. • The perch on which a bird of prey is kept. • In Conway's Game of Life, a still life consisting of four living cells arranged in a two-by-two square. • A physical area or extent of something, often rectangular or approximately rectangular. • A joined group of four (or in some cases nine) postage stamps, forming a roughly square shape. • A discrete group of vines in a vineyard, often distinguished from others by variety, clone, canopy training method, irrigation infrastructure, or some combination thereof. • A logical extent or region; a grouping or apportionment of like things treated together as a unit. • A logical data storage unit containing one or more physical sectors. • A region of code in a program that acts as a single unit, such as a function or loop. • A fixed-length group of bits making up part of a message. • A portion of a macromolecule, comprising many units, that has at least one feature not present in adjacent portions. • A section of a railroad where the block system is used. • 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 yeargroup at Eton College. • 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 cuboid or approximately cuboid building. • A cellblock. • Something that prevents something from passing. • Interference or obstruction of cognitive processes. • Any point on the board where two or more men rest, and consequently an opponent may not land. • An action to interfere with the movement of an opposing player or of the object of play (ball, puck). • A shot played by holding the bat vertically in the path of the ball, so that it loses momentum and drops to the ground. • The position of a player or bat when guarding the wicket. • A blockhole. • The popping crease. • A defensive play by one or more players meant to deflect a spiked ball back to the hitter’s court. • The portion of the movement where a gymnast pushes off the vault. • 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. • The human head. • Solitary confinement. • A blockhead; a stupid person; a dolt.