3. a. A theme, motif, plot, or literary device that commonly recurs within a genre or work of fiction, especially when considered clichéd: “Finding the corrosion under the waxed-and-polished chassis of small-town America is itself an old trope” (James Poniewozik).
b. An often recurring idea or image: “In our conversations, there was a running theme, a trope, of economic havoc, of drowned cities, of time running out” (Jon Gertner).