PIECE › a solid piece of something, usually in the shape of a square or rectangle: a block of ice/stone/wood
DISTANCE US › the distance along a street from where one road crosses it to the place where the next road crosses it: They only live two blocks away from the school.
BUILDING › a large building containing many apartments or offices: UK a block of flats
GROUP OF BUILDINGS › a square group of buildings or houses with roads on each side: Omar took the dog for a walk round the block.
CANNOT THINK › If you have a block about something, you cannot understand it or remember it: I had a complete mental block about his name.
STOP PROGRESS › something that makes it difficult to move or make progress