massive

American Heritage® Dictionary of the English Language, Fourth Edition

1. adj. Consisting of or making up a large mass; bulky, heavy, and solid: a massive piece of furniture.
2. adj. Large or imposing, as in quantity, scope, degree, intensity, or scale: "Local defense must be reinforced by the further deterrent of massive retaliatory power” ( John Foster Dulles). See Synonyms at heavy.
3. adj. Large in comparison with the usual amount: a massive dose of a drug.
4. adj. Pathology Affecting a large area of bodily tissue; widespread and severe: massive gangrene.
5. adj. Mineralogy Lacking internal crystalline structure; amorphous.
6. adj. Geology Without internal structure or layers and homogeneous in composition. Used of a rock.

Century Dictionary and Cyclopedia

1. Forming or consisting of a large mass; solid; having great size and weight; heavy; weighty; ponderous: as, a massive weapon.
2. Existing in mass or masses; massed or aggregated; not separated into parts or elements: specifically applied in psychology to sensations or feelings.
3. Pertaining to the whole mass or bulk of anything; total, as to mass; not special, local, or partial.
4. 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.
5. In geology, homogeneous; destitute of structural divisions, such as planes of stratification or jointing. By some geologists the term massive is used as synonymous with eruptive or Plutonic igneous, but such rocks often have one or more well-marked systems of joints, and are by no means homogeneous.
6. In zoology, massed: applied to the type of structure represented by the mollusks.
7. In zoology: Noting a compact sponge of any kind which grows more or less equally in all directions: contrasted with incrusting, dendritic, flabellate, etc.
8. In pathology, extensive; involving a large mass of tissue.
9. n. Same as massif.

Wiktionary

1. adj. Of or pertaining to a large mass; weighty, heavy, or bulky.
2. adj. Much larger than normal.
3. adj. Of great significance or import; overwhelming.
4. adj. Possessing mass, and thus subject to gravity

GNU Webster's 1913

1. adj. Forming, or consisting of, a large mass; compacted; weighty; heavy; massy.
2. adj. In mass; not necessarily without a crystalline structure, but having no regular form.

WordNet 3.0

1. adj. being the same substance throughout
2. adj. imposing in size or bulk or solidity
3. adj. consisting of great mass; containing a great quantity of matter
4. adj. imposing in scale or scope or degree or power