Definify.com
Webster 1913 Edition
massive
mass′ive
(mȧs′ĭv)
, Adj.
 [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 schistose, as granite; also, with some authors, an eruptive rock.