A slab is a great big thick piece of something. Your backyard patio, for example, might be made of a huge slab of concrete.

A sidewalk is often composed of one cement slab after another — these are sometimes called paving slabs. You could refer to large pieces of stone or wood as slabs too. Even your lunch might be a slab, if it's a thick hunk of cheesy pizza or a huge slab of bread slathered with peanut butter. The origins of the word slab are unknown, though we do know it's been around since the thirteenth century.

Definitions of slab

n block consisting of a thick piece of something

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butcher block, butcher board
a thick wooden slab formed by bonding together thick laminated strips of unpainted hardwood
a slab of stone or wood suitable for bearing an inscription
a flat thin rectangular slab (as of fired clay or rubber or linoleum) used to cover surfaces
a tablet placed horizontally on top of the capital of a column as an aid in supporting the architrave
(formerly) a writing tablet made of slate
a small square tile of stone or glass used in making mosaics
Type of:
a solid piece of something (usually having flat rectangular sides)

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