(physics) matter composed of baryons and electrons

(astronomy) Any large aggregate of ordinary matter that does not emit light.

(astronomy, physics) dark matter comprising elementary particles whose composition is as yet unknown, but is presumed to be unlike normal protons, neutrons and electrons etc.

The matter or thought presented for consideration in some statement or discussion; that which is made the object of thought or study.

Alternative spelling of fecal matter

(American spelling) Alternative spelling of grey matter

A fact or statement that is recorded in governmental records or in publications. / (law) A fact that is contained within court files or has otherwise been entered into evidence before the court.

forming a thick tangled mess / covered with mats or matting

simple past tense and past participle of mat

(neuroanatomy) A region of the central nervous system containing myelinated nerve fibres and no dendrites