(n) (American football) the act of obstructing someone's path with your body; "he threw a rolling block into the line backer"
(n) a platform from which an auctioneer sells; "they put their paintings on the block"
(n) a solid piece of something (usually having flat rectangular sides); "the pyramids were built with large stone blocks"
(n) housing in a large building that is divided into separate units; "there is a block of classrooms in the west wing"
(n) an obstruction in a pipe or tube; "we had to call a plumber to clear out the blockage in the drainpipe"
(n) a metal casting containing the cylinders and cooling ducts of an engine; "the engine had to be replaced because the block was cracked"
(n) a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope
(n) an inability to remember or think of something you normally can do; often caused by emotional tension; "I knew his name perfectly well but I had a temporary block"
(n) a number or quantity of related things dealt with as a unit; "he reserved a large block of seats"; "he held a large block of the company's stock"
(n) a rectangular area in a city surrounded by streets and usually containing several buildings; "he lives in the next block"
(n) (computer science) a sector or group of sectors that function as the smallest data unit permitted; "since blocks are often defined as a single sector, the terms `block' and `sector' are sometimes used interchangeably"
(n) a three-dimensional shape with six square or rectangular sides
(v) prohibit the conversion or use of (assets); "Blocked funds"; "Freeze the assets of this hostile government"
(v) shape into a block or blocks; "block the graphs so one can see the results clearly"
(v) shape by using a block; "Block a hat"; "block a garment"
(v) be unable to remember; "I'm drawing a blank"; "You are blocking the name of your first wife!"
(v) interfere with or prevent the reception of signals; "Jam the Voice of America"; "block the signals emitted by this station"
(v) impede the movement of (an opponent or a ball); "block an attack"
(v) support, secure, or raise with a block; "block a plate for printing"; "block the wheels of a car"
(v) block passage through; "obstruct the path"
(v) render unsuitable for passage; "block the way"; "barricade the streets"; "stop the busy road"
(v) obstruct; "My nose is all stuffed"; "Her arteries are blocked"
(v) stamp or emboss a title or design on a book with a block; "block the book cover"
(v) shut out from view or get in the way so as to hide from sight; "The thick curtain blocked the action on the stage"; "The trees obstruct my view of the mountains"
(v) interrupt the normal function of by means of anesthesia; "block a nerve"; "block a muscle"
(v) run on a block system; "block trains"
(v) hinder or prevent the progress or accomplishment of; "His brother blocked him at every turn"
(v) stop from happening or developing; "Block his election"; "Halt the process"