subject matter
US /ˈsʌbdʒekt ˌmætər/
UK /ˈsʌbdʒekt ˌmætər/

1.
subjek, perkara
the topic or theme of a book, discussion, or work of art
:
•
The subject matter of the painting was a landscape.
Subjek lukisan itu adalah pemandangan.
•
The professor's lecture covered a wide range of subject matter.
Kuliah profesor meliputi pelbagai subjek.