Pronunciation: (thik'nis),[key] —n. 1. the state or quality of being thick.
2. the measure of the smallest dimension of a solid figure: a board of two-inch thickness. 3. the thick part or body of something: the thickness of the leg. 4. a layer, stratum, or ply: three thicknesses of cloth.
—v.t. to bring (a piece, as a board) to a uniform thickness.