<p><strong>Noun</strong></p><ul><li>the state or quality of being thick.</li><li>the measure of the smallest dimension of a solid figure: a board of two-inch thickness.</li><li>the thick part or body of something: the thickness of the leg.</li><li>a layer, stratum, or ply: three thicknesses of cloth.</li></ul><p><strong>Verb</strong></p><ul><li>to bring (a piece, as a board) to a uniform thickness.</li></ul>