Definitions

1. noun

Additional building or units constructed within an existing development or between existing buildings, often to increase density or provide additional housing.

“The city’s infill development program aims to reuse underutilized land and revitalize existing neighborhoods.”

2. verb

To fill or add something to an existing space or development, often to increase density or provide additional housing.

“The new project will infill the empty lot with several residential units and community facilities.”