verb (used with object)

  1. to fill in: The old stream beds have been infilled with sediment.


  1. 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.


  1. of, relating to, or involving the use of infill in urban planning: infill condominium projects; infill office buildings and retail space.


  1. the act of filling or closing gaps, etc, in something, such as a row of buildings
  2. material used to fill a cavity, gap, hole, etc
  3. an acrylic gel application that fills in the gap between a false nail and the root of the real nail, which is created as the real nail grows
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