material (substance of which something is made) / matter (material things, things in general) / matter / matter (that which is thought) / content, matter (the thing in question) / subject (at school)

(astronomy) dark matter

fat (refined substance chemically resembling the oils in animal fat)

(chiefly in the plural) raw material

(physics) dark matter

with respect to, in regard to, in respect of, as regards, regarding, when it comes to

an introduction, a way in, a lead-in

(idiomatic) an expert in the matter; a person with good judgment

plural of orfèvre en la matière

(physics) state of matter (any of the different phases of matter whose properties are dependent on the motions and forces of the molecules of which they are composed)