'Subject-matter' definitions:

Definition of 'Subject-matter'

From: GCIDE

Subject-matter \Sub"ject-mat`ter\, n. The matter or thought presented for consideration in some statement or discussion; that which is made the object of thought or study. [1913 Webster]
As to the subject-matter, words are always to be understood as having a regard thereto. --Blackstone. [1913 Webster]
As science makes progress in any subject-matter, poetry recedes from it. --J. H. Newman. [1913 Webster]