Dense \Dense\, a. [L. densus; akin to Gr. ? thick with hair or leaves: cf. F. dense.]

1. Having the constituent parts massed or crowded together; close; compact; thick; containing much matter in a small space; heavy; opaque; as, a dense crowd; a dense forest; a dense fog.

All sorts of bodies, firm and fluid, dense and rare. --Ray.

To replace the cloudy barrier dense. --Cowper.

2. Stupid; gross; crass; as, dense ignorance.

Source: Webster's Revised Unabridged Dictionary (1913)