Definition of slab

• n. - A thin piece of anything, especially of marble or other stone, having plane surfaces.
• n. - An outside piece taken from a log or timber in sawing it into boards, planks, etc.
• n. - The wryneck.
• n. - The slack part of a sail.
• a. - Thick; viscous.
• n. - That which is slimy or viscous; moist earth; mud; also, a puddle.