(construction) A horizontal placement of concrete directly over a prepared earth substrate.

(construction) A layer of concrete, typically 2 to 6 inches thick, poured below the structural slab but above a layer of wet or muddy soil.

(construction) A method of construction using two separate concrete slabs: the first placed as a slab on grade or suspended slab and covered with waterproofing and a drainage system; the second, or topping slab, placed over the underlying slab and waterproofing.

having flat sides / (US, colloquial) tall, or long and lank

(nautical) A line or small rope by which sailors haul up the foot of the mainsail or foresail.

plural of slab line

A relatively large cake from which individual portions are cut or sliced

A kind of milling machine specialized to develop flat surfaces.

plural of slab track

(rail transport) Railway track mounted on a concrete (or asphalt) base, without the use of ballast.