Noun

• S: (n) subject, topic, theme (the subject matter of a conversation or discussion) "he didn't want to discuss that subject"; "it was a very sensitive topic"; "his letters were always on the theme of love"
• S: (n) 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"