noun
material used to refill an excavated area or hole
verb
to refill an excavated area or hole with material
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The construction crew used backfill to fill in the trench after laying the utility lines.
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We need to backfill the hole in the backyard before the party tomorrow.
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Hey, can you help me backfill this project before the deadline?
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She tried to backfill her lack of experience with confidence during the interview.