mat·ter n
1: a subject of consideration, disagreement, or litigation: as
a: a legal case, dispute, or issue
a matter within the court's jurisdiction
— often used in titles of legal proceedings
matter of Doe see also in re
b: one or more facts, claims, or rights examined, disputed, asserted, proven, or determined by legal process
matter in controversy
1: matter (1) – called also matter in dispute;
2: the monetary amount involved in a case
matter in issue: a matter that is in dispute as part or all of a legal issue
matter of fact: a matter primarily involving proof or evidence rather than a question of law
matter of form: a matter concerning form or details often of a relatively inessential nature rather than substance
a petition invalid because of a matter of form
matter of law: a matter involving or consisting of the application of law
entitled to judgment as a matter of law — National Law Journal
matter of record: a matter (as a fact) entered on the record of a court or other official body
the security interest was a matter of record
matter of substance: a matter concerning the merits of a case rather than form or relatively inessential details
2: written, printed, or postal material
obscene matter
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.