Monumental

a.	1.	Of, pertaining to, or suitable for, a monument; as, a monumental inscription.
	2.	Serving as a monument; memorial; preserving memory. A work outlasting monumental brass. - Pope.
	3.	Of lasting significance; as, a monumental work of literature; a monumental accomplishment.
	4.	Exceptionally large in quantity, quality, or degree; as, a monumental amount of work to be done

Adj.	1.	monumental - relating or belonging to or serving as a monument; "the use of the arch in monumental architecture"; "monumental sculptures"
	2.	monumental - of outstanding significance; "Einstein's monumental contributions to physics"
	3.	monumental - imposing in size or bulk or solidity; "massive oak doors"; "Moore's massive sculptures"; "the monolithic proportions of Stalinist architecture"; "a monumental scale" Synonyms: massive, monolithic

Atlantean, Brobdingnagian, Cyclopean, Gargantuan, Herculean, Homeric, Olympian, abject, abysmal, aerial, airy, altitudinous, amplitudinous, ascending, aspiring, astronomic, astronomical, awe-inspiring, awesome, awful, boundless, bulky, calamitous, catastrophic, classic, commemorative, cosmic, cracking, dominating, egregious, elephantine, elevated, eminent, enduring, epic, ethereal, exalted, extensive, fantastic, galactic, giant, giantlike, glorious, grand, haughty, heroic, high, high-pitched, high-reaching, high-set, high-up, historic, immeasurable, impressive, infinite, jumbo, king-size, large, lasting, lofty, magnificent, mammoth, marmoreal, massive, massy, memorable, memorial, mighty, monster, monstrous, mortal, mountainous, mounting, notable, noteworthy, outsize, outstanding, outtopping, overgrown, overlooking, overtopping, overwhelming, permanent, prodigious, profound, prominent, sculptitory, sculptural, sculpturesque, significant, sizable, soaring, spacious, spectacular, spiring, staggering, statuary, statuelike, statuesque, steep, striking, stupendous, sublime, superlative, supernal, terrible, titanic, topless, toplofty, topping, towering, towery, tremendous, unbelievable, unforgettable, unforgivable, uplifted, upreared, vast, voluminous, weighty, whopping, wonderful, wondrous