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backfill

verb

back·​fill ˈbak-ˌfil How to pronounce backfill (audio)
backfilled; backfilling; backfills

transitive + intransitive

: to refill (something, such as an excavation) usually with excavated material
backfill a trench
backfill noun

Word History

First Known Use

1874, in the meaning defined above

Time Traveler
The first known use of backfill was in 1874

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