Meaning of SLAB in English

[noun] [C] - a thick, flat piece of a solid substance, such as stone, wood, metal, food, etc., which is usually square or rectangularThey were housed in a striking white building made of massive concrete slabs/slabs of concrete.The top of the table was a polished marble slab/slab of marble.We have just laid some paving slabs in our garden to make a path.He ate a slab of cheese with some bread.

Cambridge English vocab.      Кембриджский английский словарь.