- The definition of backfill is material used to refill a hole, usually what was previously dug out of the hole.
Dirt and gravel are examples of backfill.
- Backfill is defined as to return soil and other materials to a hole after it was dug.
An archeologist that puts dirt back into a trench that was dug is an example of to backfill.
backfill definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
transitive verb, intransitive verb
to refill (an excavation) as with earth, etc. previously removed
material used in refilling an excavation
backfill definition by American Heritage Dictionary
Material used to refill an excavated area.transitive verb back·filled, back·fill·ing, back·fills
To refill (an excavated area) with such material.