(also infilling) [mass noun] material that fills or is used to fill a space or hole: the cave infill consists of silt and rock [count noun]: the path has brown pebble paving for an infill
buildings constructed to occupy the space between existing structures: the town has a few old houses and plenty of recent infill [as modifier]: infill development
verb
Pronunciation: /ɪnˈfɪl/
[with object]
fill or block up (a space or hole): the inlets at Seaford are now infilled
construct new buildings between (existing structures): councils can also infill existing built-up areas