1. (a.) Consisting of a large mass; compacted; weighty; heavy; bulky.

2. (a.) In mass; not necessarily without a crystalline structure, but having no regular form; as, a mineral occurs massive.

Brobdingnagian Cyclopean Gargantuan adamantine amplitudinous astronomical awesome awkward big boundless broad-bodied bulky bullnecked burdensome close close-knit close-textured close-woven clumsy coarse colossal compact compacted compressed concentrated concrete condensed congested consolidated corpulent cosmic cracking crammed crammed full crass crowded cumbersome cumbrous dense durable elephantine enduring enormous extensive fantastic fat firm full full-bodied galactic gargantuan gigantic gluey grand gross hard heavy heavyset heavyweight hefty huge hulking hulky humongous immeasurable immense impenetrable impermeable incumbent infinite jam-packed jammed jumbo king-size large lasting leaden lubberly lumbering lumpish lumpy mammoth massy mighty monster monstrous monumental mortal mountainous nonporous onerous oppressive outsize overgrown oversized overweight packed ponderous prodigious rugged serried sizable solid sound spacious stable steady stout strong stupendous sturdy substantial superincumbent thick thick-bodied thick-growing thickset three-dimensional titanic tough towering tremendous unwieldy unyielding vast viscid viscose viscous voluminous walloping weighty well-built well-constructed well-founded well-grounded well-made whopping