[{"Bold_text": "noun", "List Items": ["a person or thing that pushes .", "Slang.a peddler of illegal drugs.", "Aeronautics.an airplane that is driven by pusher propellers.", "Nautical.one of the masts abaft the mizzen on a sailing vessel having more than three masts, either the sixth or seventh from forward.Compare driver(def10b) driver(def10b), spanker(def1b) spanker(def1b).", "Railroads.a helper attached to the rear of a train, usually to provide extra power for climbing a steep grade."]}]