- material used for refilling an excavation.
- to refill (an excavation).
Origin of backfill
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- (tr) to refill an excavated trench, esp (in archaeology) at the end of an investigation
- the soil used to do this
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for backfill
Online Etymology Dictionary, © 2010 Douglas Harper