massive

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Consisting of or making up a large mass; bulky, heavy, and solid: synonym: heavy.
• adjective Physics Having relatively high mass.
• adjective Large or imposing, as in quantity, scope, degree, intensity, or scale.
• adjective Large in comparison with the usual amount.
• adjective Affecting a large area of bodily tissue; widespread and severe.
• adjective Mineralogy Lacking internal crystalline structure; amorphous.
• adjective Geology Without internal structure or layers and homogeneous in composition. Used of a rock.

from The Century Dictionary.

• Forming or consisting of a large mass; solid; having great size and weight; heavy; weighty; ponderous: as, a massive weapon.
• Existing in mass or masses; massed or aggregated; not separated into parts or elements: specifically applied in psychology to sensations or feelings.
• Pertaining to the whole mass or bulk of anything; total, as to mass; not special, local, or partial.
• In mineralogy, without crystalline form, although perhaps crystalline in structure: as, a mineral that occurs massive. A mineral which is both massive and non-crystalline is said to be amorphous.
• In geology, homogeneous; destitute of structural divisions, such as planes of stratification or jointing.
• In zoology, massed: applied to the type of structure represented by the mollusks.
• In zoology: Noting a compact sponge of any kind which grows more or less equally in all directions: contrasted with incrusting, dendritic, flabellate, etc.
• In pathology, extensive; involving a large mass of tissue.
• noun Same as massif.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Forming, or consisting of, a large mass; compacted; weighty; heavy; massy.
• adjective (Min.) In mass; not necessarily without a crystalline structure, but having no regular form.
• adjective (Geol.) a compact crystalline rock not distinctly schistose, as granite; also, with some authors, an eruptive rock.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Of or pertaining to a large mass; weighty, heavy, or bulky.
• adjective Much larger than normal.
• adjective Of great significance or import; overwhelming.
• adjective mineralogy Of a specimen not exhibiting crystal form.
• adjective Of particularly exceptional quality or value; awesome.
• adjective physics Possessing mass.
• noun mineralogy A homogeneous mass of rock, not layered and without an obvious crystal structure.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective being the same substance throughout
• adjective imposing in size or bulk or solidity
• adjective consisting of great mass; containing a great quantity of matter
• adjective imposing in scale or scope or degree or power