in·​fill | \ ˈin-ˌfil How to pronounce infill (audio) \

Definition of infill

1 : material that fills in something (such as a hole or the spaces between a building's structural members) volcanic infill fiberglass infill The artificial turf being used contains infill that is made from recycled tires …— Greg Fitzpatrick It's framed with hand-hewn cypress posts and beams, though instead of … brick infill … the walls are formed from … a mixture of mud, moss, and animal hair that was once used by native Americans living in the area.— Amy R. Hughes
2 : new buildings constructed in the space available between existing structures Urban infill, a big theme these days in city planning, is essentially the opposite of "urban sprawl." As cities grow, planners are looking for ways to pack more people into places that are already developed.— Franklyn Cater often used before another noun St. Louis must be the infill capital of the nation. Liberally scattered over the city, especially in the older parts, you see clumps and blocks of new apartments, condominia and row houses tucked in among centenarian neighbors.— E. F. Porterinfill housing

Other Words from infill

infill verb, transitive + intransitive infilled; infilling
… it was easier to achieve the vaults themselves by building them of a framework of ribs infilled with webs. — James F. O'Gorman Stump holes can be expected to infill with material from the pit walls and immediate vicinity … — Jonathan D. Phillips et al.

Examples of infill in a Sentence

Recent Examples on the Web Parks are also created during infill development and revitalization efforts, when large hotels, apartment buildings and other structures are constructed in place of older structures. Los Angeles Times, 15 Nov. 2021 Two bills in particular, Senate Bills 9 and 10, seek to increase infill density by encouraging more residences on properties that presently are used as single-family lots. Kelly G. Richardson, San Diego Union-Tribune, 30 Oct. 2021 Council Vice President Kahlil Seren cited some concerns from neighbors about the preliminary plans for the infill homes, but voted in favor of the MOU in hopes that those issues can be ironed out in further negotiations with the city. Thomas Jewell, cleveland, 24 Aug. 2021 Based in Madison, Wisconsin, the Alexander Company is an architectural firm with nearly 40 years’ experience specializing in urban infill development and historic preservation. Regina Cole, Forbes, 29 Oct. 2021 Real estate experts like Kurt Misar, a broker with NW Property Advisors, say state and city governments’ push for greater residential infill entices developers to convert a house on a large, dividable lot into up to four, limited-sized units. oregonlive, 7 Sep. 2021 But what this board is looking at is infill housing where there are vacant lots. al, 8 Oct. 2021 Nevertheless, the state’s standard is consistent with the county’s General Plan, which was updated a decade ago to discourage sprawl development in remote areas and encourage infill housing projects in urban areas near transit. San Diego Union-Tribune, 20 Sep. 2021 Tons of infill dirt was brought in, causing the land’s slope to change. Elena Bruess, San Antonio Express-News, 13 Sep. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'infill.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of infill

1939, in the meaning defined at sense 1

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Last Updated

25 Nov 2021

Cite this Entry

“Infill.” Dictionary, Merriam-Webster, Accessed 26 Nov. 2021.

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