block

Dictionary definition · block

a solid piece of something (usually having flat rectangular sides)"the pyramids were built with large stone blocks"
a rectangular area in a city surrounded by streets and usually containing several buildings"he lives in the next block"
a three-dimensional shape with six square or rectangular sides
a number or quantity of related things dealt with as a unit"he reserved a large block of seats"
housing in a large building that is divided into separate units"there is a block of classrooms in the west wing"
(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"

render unsuitable for passage"block the way"
hinder or prevent the progress or accomplishment of"His brother blocked him at every turn"
stop from happening or developing"Block his election"
interfere with or prevent the reception of signals"Jam the Voice of America"
run on a block system"block trains"
interrupt the normal function of by means of anesthesia"block a nerve"

Source: Open English WordNet (CC BY 4.0).