[{"Bold_text": "noun", "List Items": ["Building Trades.pieces of sheet metal or the like used to cover and protect certain joints and angles, as where a roof comes in contact with a wall or chimney, especially against leakage.", "the act of creating an artificial flood in a conduit or stream, as in a sewer for cleansing it.", "Photography, Movies.the process of increasing film speed by exposing undeveloped film briefly to a weak light source before using it or of exposing photographic printing paper to reduce contrast."]}]