Slab \Slab\, n. [OE. slabbe, of uncertain origin; perhaps originally meaning, a smooth piece, and akin to slape, Icel. sleipr slippery, and E. slip, v. i.]

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. (Zo["o]l.) The wryneck. [Prov. Eng.]

4. (Naut.) 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.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Slab \Slab\, a. [Cf. Gael. & Ir. slaib mud, mire left on a river strand, and E. slop puddle.]

Thick; viscous. [Obs.]

Make the gruel thick and slab. --Shak.

Source: Webster's Revised Unabridged Dictionary (1913)
 

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

--Evelyn.

Source: Webster's Revised Unabridged Dictionary (1913)