Forming, or consisting of, a large mass; compacted; weighty; heavy; massy. Dr. H. More. [1913 Webster]
In mass; not necessarily without a crystalline structure, but having no regular form; as, a mineral occurs massive. [1913 Webster]

Massive rock (Geol.), a compact crystalline rock not distinctly schistose, as granite; also, with some authors, an eruptive rock.

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OXFORD DICTIONARY

massive, adj.
1 large and heavy or solid.
2 (of the features, head, etc.) relatively large; of solid build.
3 exceptionally large (took a massive overdose).
4 substantial, impressive (a massive reputation).
5 Mineral. not visibly crystalline.
6 Geol. without structural divisions.

Derivative

massively adv. massiveness n.

Etymology

ME f. F massif -ive f. OF massiz ult. f. L massa MASS(1)

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THESAURUS

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

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ROGET THESAURUS

massive

Size

N size, magnitude, dimension, bulk, volume, largeness, greatness, expanse, amplitude, mass, proportions, capacity, tonnage, tunnage, cordage, caliber, scantling, turgidity, corpulence, obesity, plumpness, embonpoint, corporation, flesh and blood, lustihood, hugeness, enormity, immensity, monstrosity, giant, Brobdingnagian, Antaeus, Goliath, Gog and Magog, Gargantua, monster, mammoth, Cyclops, cachalot, whale, porpoise, behemoth, leviathan, elephant, hippopotamus, colossus, tun, cord, lump, bulk, block, loaf, mass, swad, clod, nugget, bushel, thumper, whooper, spanker, strapper, Triton among the minnows, mountain, mound, heap, largest portion, full size, life size, large, big, great, considerable, bulky, voluminous, ample, massive, massy, capacious, comprehensive, spacious, mighty, towering, fine, magnificent, corpulent, stout, fat, obese, plump, squab, full, lusty, strapping, bouncing, portly, burly, well-fed, full-grown, corn fed, gram fed, stalwart, brawny, fleshy, goodly, in good case, in good condition, in condition, chopping, jolly, chub faced, chubby faced, lubberly, hulky, unwieldy, lumpish, gaunt, spanking, whacking, whopping, walloping, thumping, thundering, hulking, overgrown, puffy, huge, immense, enormous, mighty, vast, vasty, amplitudinous, stupendous, monster, monstrous, humongous, monumental, elephantine, jumbo, mammoth, gigantic, gigantean, giant, giant like, titanic, prodigious, colossal, Cyclopean, Brobdingnagian, Bunyanesque, Herculean, Gargantuan, infinite, large as life, plump as a dumpling, plump as a partridge, fat as a pig, fat as a quail, fat as butter, fat as brawn, fat as bacon, immeasurable, unfathomable, unplumbed, inconceivable, unimaginable, unheard-of, of cosmic proportions, of epic proportions, the mother of all, teh granddaddy of all.

Gravity

N gravity, gravitation, weight, heaviness, specific gravity, pondorosity, pressure, load, burden, burthen, ballast, counterpoise, lump of, mass of, weight of, lead, millstone, mountain, Ossa on Pelion, weighing, ponderation, trutination, weights, avoirdupois weight, troy weight, apothecaries' weight, grain, scruple, drachma, ounce, pound, lb, arroba, load, stone, hundredweight, cwt, ton, long ton, metric ton, quintal, carat, pennyweight, tod, gram, centigram, milligram, microgram, kilogram, nanogram, picogram, femtogram, attogram, balance, scale, scales, steelyard, beam, weighbridge, spring balance, piezoelectric balance, analytical balance, two-pan balance, one-pan balance, postal scale, baby scale, statics, weighty, weighing, heavy as lead, ponderous, ponderable, lumpish, lumpy, cumbersome, burdensome, cumbrous, unwieldy, massive, incumbent, superincumbent.

Density

N density, solidity, solidness, impenetrability, impermeability, incompressibility, imporosity, cohesion, constipation, consistence, spissitude, specific gravity, hydrometer, areometer, condensation, caseation, solidation, solidification, consolidation, concretion, coagulation, petrification, crystallization, precipitation, deposit, precipitate, inspissation, gelation, thickening, indivisibility, indiscerptibility, insolubility, indissolvableness, solid body, mass, block, knot, lump, concretion, concrete, conglomerate, cake, clot, stone, curd, coagulum, bone, gristle, cartilage, casein, crassamentum, legumin, superdense matter, condensed states of matter, dwarf star, neutron star, dense, solid, solidified, caseous, pukka, coherent, cohesive, compact, close, serried, thickset, substantial, massive, lumpish, impenetrable, impermeable, nonporous, imporous, incompressible, constipated, concrete, knotted, knotty, gnarled, crystalline, crystallizable, thick, grumous, stuffy, undissolved, unmelted, unliquefied, unthawed, indivisible, indiscerptible, infrangible, indissolvable, indissoluble, insoluble, infusible.

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