Subject matter is what something is about.
An example of subject matter is a paper written about dogs.
the thing or things considered in a book, course of instruction, discussion, etc.
Matter under consideration in a written work or speech; a theme.
(plural subject matters)
- Alternative form of subject matter.
subject matter - Legal Definition
Whatever is in dispute; the actual cause of the law suit; the issue about which a right or obligation has been asserted or denied.