Massive Definition & Meaning Merriam-Webster. Web1 : forming or consisting of a large mass: a : bulky massive furniture b : weighty, heavy massive walls a massive volume c : impressively large or ponderous stars more massive than the sun d : having no regular form but not necessarily lacking crystalline structure massive sandstone 2 a : large, solid, or heavy in structure massive.

WebSynonyms of massive See Definition massive adjective 1 as in heavy having great weight a massive piece of furniture that was nearly impossible to move.