Physical matter; material. / A form of matter that has constant chemical composition and characteristic properties. / The essential part of anything; the most vital part.

(rare, transitive) To give substance to; to make real or substantial.

plural of substance

simple past tense and past participle of substance

The property of being a substance.

present participle of substance

(officialese, law) A drug or chemical whose use, possession, manufacture, or sale is regulated or banned by the government.

(chemistry) The number of particles or formula units (depending on type) present of some substance in some sample; SI unit: mole.

plural of amount of substance

(zoology) chemical given off from the skin of a fish after injury that warns nearby fish of danger.