infill

or in-fill

[ in-fil ]
/ ˈɪnˌfɪl /

verb (used with object)

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

noun

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.

adjective

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

Origin of infill

First recorded in 1875–80; in-1 + fill
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for in-fill

infill

infilling (ˈɪnfɪlɪŋ)

/ (ˈɪnfɪl) /

noun

the act of filling or closing gaps, etc, in something, such as a row of buildings
material used to fill a cavity, gap, hole, etc
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

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012