infill

US /ˈɪnfɪl/
UK /ˈɪnfɪl/
"infill" picture
1.

material used to fill a space or cavity

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The construction crew used sand as infill for the foundation.
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They added more rubber infill to the artificial turf.
:
fillerpackingstuffingpaddinggrout
2.

the development of vacant or underutilized land within an existing urban area

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The city council approved the new infill project downtown.
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Infill development helps to maximize the use of existing infrastructure.
:
urban infillredevelopmentdensification
1.

to fill a space or cavity with material

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They plan to infill the old quarry with inert waste.
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The dentist had to infill the small cavity in her tooth.
:
fillpackstuffpadgrout
2.

to develop vacant or underutilized land within an existing urban area

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The city aims to infill neglected lots to create more housing.
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It's more sustainable to infill existing areas than to expand outwards.
:
redevelopdensifyurbanize