material used for refilling an excavation.
to refill (an excavation).
(transitive) to refill an excavated trench, esp (in archaeology) at the end of an investigation
the soil used to do this
1901 (as backfilling), from back (adj.) + fill (n.). The verb was in use by 1930.
(of an internal-combustion engine) to have a loud, premature explosion in the intake manifold. to bring a result opposite to that which was planned or expected: The plot backfired. to start a fire deliberately in order to check a forest or prairie fire by creating a barren area in advance of it. (in an internal-combustion […]
a karate punch with the back of a clenched hand.
to update by providing new or improved equipment or features: a five-year program of installing new power plants and backfitting existing ones.
- Backflap hinge
Building Trades. flap (def 20a).