# backfill

> English word · Verb · IPA /ˈbækfɪl/ · frequency rank #77,436

## Definitions
1. To refill a hole with the material dug out of it.
2. To refill an excavation unit to restore the former ground surface and/or to preserve the unit and make it recognizable as having been excavated.
3. To provide reserve support.
4. To replenish or restock due to attrition or loss.
5. To enter an online game that's already in progress, replacing a player who left early.

## Etymology
From back + fill.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/backfill