Crass \Crass\ (kr?s), a. [L. crassus thick, fat, gross, prob. orig., closely woven. See Grease animal fat, and cf. Crate, Hurdle.]

Gross; thick; dense; coarse; not elaborated or refined. ``Crass and fumid exhalations.'' --Sir. T. Browne. ``Crass ignorance'' --Cudworth.

Source: Webster's Revised Unabridged Dictionary (1913)