A Slab

1. A large, flat piece of solid material; a solid object that is large and flat.
2. A paving stone; a flagstone.
3. (Australia) A carton containing 24 cans of beer.
4. An outside piece taken from a log or timber when sawing it into boards, planks, etc.
5. A bird, the wryneck.
6. (nautical) The slack part of a sail.
7. (slang) A large, luxury pre-1980 General Motors vehicle, particularly a Buick, Oldsmobile or Cadillac.
8. (surfing) A very large wave.
9. (computing) A sequence of 12 adjacent bits, serving as a byte in some computers.
10. (geology) Part of a tectonic plate that is being subducted. Slab (geology) - Wikipedia