• Measuring in the third dimension other than length and breadth, or in general dimension other than length; -- said of a solid body; as, a timber seven inches thick. • Having more depth or extent from one surface to its opposite than usual; not thin or slender; as, a thick plank; thick cloth; thick paper; thick neck. • Dense; not thin; inspissated; as, thick vapors. Also used figuratively; as, thick darkness. • Not transparent or clear; hence, turbid, muddy, or misty; as, the water of a river is apt to be thick after a rain. • Abundant, close, or crowded in space; closely set; following in quick succession; frequently recurring. • Not having due distinction of syllables, or good articulation; indistinct; as, a thick utterance. • Deep; profound; as, thick sleep. • Dull; not quick; as, thick of fearing. • Intimate; very friendly; familiar. • The thickest part, or the time when anything is thickest. • A thicket; as, gloomy thicks. • Frequently; fast; quick. • Closely; as, a plat of ground thick sown. • To a great depth, or to a greater depth than usual; as, land covered thick with manure. • To thicken.