consisting of or forming a large mass; bulky and heavy

massive columns.

large and heavy-looking

a massive forehead.

large in scale, amount, or degree

a massive breakdown in communications; massive reductions in spending.

solid or substantial; great or imposing

massive erudition.

Mineralogy . having no outward crystal form, although sometimes crystalline in internal structure.

adjective

little , miniature , small , tiny

adjective

big , bulky , colossal , cracking , cumbersome , cumbrous , elephantine , enormous , extensive , gargantuan , gigantic , grand , great , gross , heavy , hefty , huge , hulking , immense , imposing , impressive , mammoth , mighty , monster , monumental , mountainous , ponderous , prodigious , solid , stately , substantial , titanic , towering , tremendous , unwieldy , vast , walloping , weighty , whopping * , oversize , oversized , heavyweight , behemoth , brobdingnagian , bunyanesque , cyclopean , gigantesque , herculean , heroic , jumbo , massy , mastodonic , monstrous , pythonic , stupendous , boisterous , giant , large , whopping