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Definition of backfill

backfill

/ˈbækˌfɪl/
back · fill

Plural:backfills
•
Past Simple:backfilled
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Past Participle:backfilled
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Present Participle:backfilling
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backfill Lexical Profile

backfill Game Scores & Validity

• verb

1

To refill an excavated hole, trench, or space with the material dug out of it or with other suitable material.

Example

"Workers will backfill the utility trench with sand and crushed stone once the cables are inspected."


2

To staff a vacated job position or replenish missing historical data, inventory, or schedule slots.

Example

"Human resources plans to backfill the project coordinator role as soon as the current lead transitions to her new team."

Synonyms
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Antonyms
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• noun

1

Soil, gravel, rubble, or other material used to refill an excavated trench, hole, or foundation.

Example

"The construction crew compacted the gravel backfill around the newly laid concrete pipes."


2

A replacement employee hired or assigned to fill a position that was recently vacated, often due to an internal transfer or promotion.

Example

"The department manager requested an immediate backfill after her senior analyst moved to the regional office."

Synonyms
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Word Origin & Etymology

Formed in the late 19th century as a compound of 'back' and 'fill', originally used in civil engineering and construction to describe returning excavated earth into a trench.

Cite this Entry


Wordmom. (2026). Definition of Backfill. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/backfill
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