a block meaning

• [Civil engineering]
  "A hollow concrete masonry block with one end closed and the other open and with a web between, so that when the block is laid in a wall two cells are produced."

• a-block:    [Architecture]A ho ...
• block:    Noun: block & ...
• block in:    1. block sb/sth in ...

Examples

1. he has a block when it comes to math.
2. a book remains shut is but a block.
3. he sat down on a block of stone and tuned his harp.
4. this was compared with a block of iron squeezed on an anvil.
5. as soon as the boy begins to harden, she'll care no more for him than for a block of wood.