Slab

Part of speech: noun (n.)

1. A thin piece of anything, especially of marble or other stone, having plane surfaces. Gwilt.

2. An outside piece taken from a log or timber in sawing it into boards, planks, etc.

3. The wryneck. [Prov. Eng.]

4. The slack part of a sail. Slab line (Naut.), a line or small rope by which seamen haul up the foot of the mainsail or foresail. Totten.

Part of speech: noun (n.)

That which is slimy or viscous; moist earth; mud; also, a puddle. [Obs.] Evelyn.

Part of speech: adjective (a.)

Thick; viscous. [Obs.] Make the gruel thick and slab. Shak.