What does BLOCK mean?

noun

1. a solid piece of something (usually having flat rectangular sides)“the pyramids were built with large stone blocks”
2. a rectangular area in a city surrounded by streets and usually containing several buildings“he lives in the next block”
3. a three-dimensional shape with six square or rectangular sides
4. a number or quantity of related things dealt with as a unit“he reserved a large block of seats”
5. housing in a large building that is divided into separate units“there is a block of classrooms in the west wing”
6. (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”
7. 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”
8. 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