The noun matter has 6 senses (first 5 from tagged texts)
1. (41) substance, matter -- (that which has mass and occupies space; "an atom is the smallest indivisible unit of matter")
2. (35) matter, affair, thing -- (a vaguely specified concern; "several matters to attend to"; "it is none of your affair"; "things are going well")
3. (32) topic, subject, issue, matter -- (some situation or event that is thought about; "he kept drifting off the topic"; "he had been thinking about the subject for several years"; "it is a matter for the police")
4. (1) matter -- (a problem; "is anything the matter?")
5. (1) matter -- ((used with negation) having consequence; "they were friends and it was no matter who won the games")
6. matter -- (written works (especially in books or magazines); "he always took some reading matter with him on the plane")
Overview of verb matter
The verb matter has 1 sense (first 1 from tagged texts)
1. (21) count, matter, weigh -- (have weight; have import, carry weight; "It does not matter much")