- (n.) A thick residuum obtained from certain substances after the fluid parts are expressed from them; the grounds which remain after treating a substance with any menstruum, as water or alcohol.
- (n.) The glassy base of an eruptive rock.
- (n.) Any crude mixture of mineral or organic matters in the state of a thin paste.
- (n.) A salve or confection of thick consistency.
- (n.) The molten matter within the earth, the source of the material of lava flows, dikes of eruptive rocks, etc.
- (n.) The amorphous or homogenous matrix or ground mass, as distinguished from well-defined crystals; as, the magma of porphyry.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). magma. Retrieved September 25, 2026, from http://smartdefine.org/magma/definitions/2029730 |
| Chicago | Webster's. 2011. "magma" http://smartdefine.org/magma/definitions/2029730 (accessed September 25, 2026). |
| Harvard | Webster's 2011, magma, Smart Define, viewed 25 September, 2026, <http://smartdefine.org/magma/definitions/2029730>. |
| MLA | Webster's. "magma" 27 May 2011. Web. 25 September 2026. <http://smartdefine.org/magma/definitions/2029730> |