[{"Bold_text": "noun", "List Items": ["a very large person, animal, or thing.", "jumbo jet jumbo jet.", "U.S. Nautical.a forestaysail having a boomjum·bo its foot, used especially on schooners.a sail used in place of a course on a square-rigged ship, having the form of an isosceles triangle set apex downward.a narrow triangular sail set point downward in place of a foresail on a topsail schooner.", "a forestaysail having a boomjum·bo its foot, used especially on schooners.", "a sail used in place of a course on a square-rigged ship, having the form of an isosceles triangle set apex downward.", "a narrow triangular sail set point downward in place of a foresail on a topsail schooner."]}, {"Bold_text": "adjective", "List Items": ["very large:the jumbo box of cereal."]}]