Flat, thick pieces of a material like stone or concrete.
Slabs are often heavy and used for building things like floors and walls.
Examples:
The workers are carrying heavy slabs of stone.
We need three slabs of concrete for the project.
The cat is sitting on the warm slab of rock.
I accidentally dropped the slab on my toe!
The slabs of chocolate were as big as tables.
The slabs of ice were so slippery, we couldn't walk on them.