The definition of backfill is material used to refill a hole, usually what was previously dug out of the hole.noun
Dirt and gravel are examples of backfill.
Backfill is defined as to return soil and other materials to a hole after it was dug.verb
An archeologist that puts dirt back into a trench that was dug is an example of to backfill.YourDictionary definition and usage example. Copyright © 2013 by LoveToKnow Corp.
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
transitive verb, intransitive verb
to refill (an excavation) as with earth, etc. previously removed
material used in refilling an excavation
Used by arrangement with John Wiley & Sons, Inc.
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Material used to refill an excavated area. transitive verb back·filled
To refill (an excavated area) with such material.