1. (a.) 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.

2. (a.) Stupid; gross; crass; as, dense ignorance.

Boeotian adamantine asinine beef-brained beef-witted blockheaded blockish bony bovine bristling broad-bodied bulky bullnecked cement cemental chumpish cloddish close close-knit close-textured close-woven coarse compact compacted compressed concentrated concrete condensed congested consolidated corneous corpulent cowish crammed crammed full crass crawling crowded diamondlike dim dim-witted doltish dull dullard dumb duncical duncish durable dure enduring exuberant fat fatheaded firm flintlike flinty flourishing foolish full full-bodied gluey granitelike granitic gross hard hard as nails hardhearted heaped heavy heavyset horny impassable impassive impenetrable impermeable ineducable iron-hard ironlike jam-packed jammed jungled jungly klutzy lapideous lasting lethargic lithoid lithoidal lumpish lush luxuriant marble marblelike massed massive nonporous numskulled oafish obdurate obtuse opaque osseous overgrown overrun packed phlegmatic piled populous rank resistant resistive riotous rocklike rocky rugged serried slow slow-witted sluggish solid sottish sound stable steady steellike steely stolid stonelike stony stout strong stupid sturdy substantial swarming teeming thick thick-bodied thick-growing thick-witted thickheaded thickset three-dimensional tight torpid tough unteachable unweeded unyielding viscid viscose viscous weed-choked weed-ridden weedy well-built well-constructed well-founded well-grounded well-made wrongheaded