The matter or thought presented for consideration in some statement or discussion; that which is made the object of thought or study.(noun)
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Use "subject-matter" in a sentence
"Yet you're bound to wonder if it's just another ego trip that allows new subject-matter and a new persona for his journalism, the laddish type being so 1990s and, in any case, not quite right for a man nearing his sixth decade."
"Barnett Newman said “Most people think of subject-matter as what Meyer Shapiro has called ‘object-matter.’”"
"Lisette smiled and remarked, "So often you two girls photograph the same subject-matter, but you have such very different points-of-view!""