Massive, a.
Etymology: [F. massif.]
1. Forming, or consisting of, a large mass; compacted; weighty; heavy; massy. "Massive armor." Dr. H. More.
2. (Min.)
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.
Shades of meaning
Fernald has no entry of its own for massive; he lists it under large.
He lists it without comment; the entries above explain its neighbors.