[{"Bold_text": "noun", "List Items": ["something that marks or temporarily fills a place (often used attributively):We’re using placeholder art in this mock-up of the ad layout.I couldn’t find my bookmark, so I put a coaster in my book as a placeholder.We’re using placeholder art in this mock-up of the ad layout.", "Mathematics, Logic.a symbol in an expression that may be replaced by the name of any element of the set.", "a person who holds a government office, especially one appointed to the position in return for political support or favors."]}]