105645199 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".
107954014 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".
104020298 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.
113626464 (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".