- material used for refilling an excavation.
- to refill (an excavation).
- to make up for a loss or shortfall of supplies or funds: It is illegal to backfill the state budget with federal emergency funds.
- to fill (a recently vacated position), often with an internal candidate or temp.
- to refill an excavated trench, esp (in archaeology) at the end of an investigation
- the soil used to do this
