Mass"ive (?), a. [F. massif.]
Forming, or consisting of, a large mass; compacted; weighty; heavy; massy.
Dr. H. More.
In mass; not necessarily without a crystalline structure, but having no regular form; as, a mineral occurs massive.
Massive rock Geol., a compact crystalline rock not distinctly schistone, as granite; also, with some authors, an eruptive rock.
© Webster 1913.