1. Buildings filling in empty space between other buildings or on vacant waste land
   "The new infill development helped revitalize the neighbourhood"
    
2. Material for filling a space or hole
   "They used sand as infill for the retaining wall"

1. Fill in a space, hole or gap
   "They used gravel to infill the trench"

Derived forms: infills, infilling, infilled

Encyclopedia: Infill