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 But efforts to encourage infill development have been met with creative expressions of California’s notorious NIMBYism, with much of the opposition centered on worries about parking and traffic. Emily Witt, The New Yorker, 3 May 2022 The trend is encouraged by state laws that require incentives for developers who include low-income housing and build infill projects close to public transit. Phil Diehl, San Diego Union-Tribune, 6 Feb. 2022 Kreklow said this is the last infill land project or area dedicated to new construction in the village. Cathy Kozlowicz, Milwaukee Journal Sentinel, 6 Apr. 2022 The project is a pointed example of infill development, occupying a 16,000-square-foot parcel of land with 94 apartments near the North Park Water Tower. Phillip Molnar, San Diego Union-Tribune, 17 Mar. 2022 The council urged legislators to rewrite CEQA, so urban infill projects aren’t subjected to such a grueling, costly review process. Dustin Gardiner, San Francisco Chronicle, 8 Mar. 2022 Houston has chosen the 240-acre site of a former landfill to install what the city said will be the largest infill solar project in the nation. NBC News, 7 Mar. 2022 Our older neighborhoods have traffic, design and density challenges for any future infill. Jim Riccioli, Milwaukee Journal Sentinel, 9 Mar. 2022 That means the coverage is similar to Verizon's existing Band 66 4G sites, which means C-band can be put on those existing sites and can duplicate coverage without much infill needed. Sascha Segan, PCMAG, 4 Mar. 2022 See More

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.

First Known Use of infill

1939, in the meaning defined at sense 1

Learn More About infill

Dictionary Entries Near infill




See More Nearby Entries 

Statistics for infill

Last Updated

17 May 2022

Cite this Entry

“Infill.” Dictionary, Merriam-Webster, Accessed 21 May. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon


Test Your Vocabulary

Name That Food

  • a-light
  • Name these cookies!
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!