[{"Bold_text": "verb (used with object)", "List Items": ["to fill :The old stream beds have been infilled with sediment."]}, {"Bold_text": "noun", "List Items": ["the planned conversion of empty lots, underused or rundown buildings, and other available space in densely built-up urban and suburban areas for use as sites for commercial buildings and housing, frequently as an alternative to overdevelopment of rural areas."]}, {"Bold_text": "adjective", "List Items": ["of, relating to, or involving the use of infill in urban planning:infill condominium projects; infill office buildings and retail space."]}]