[bak-fahyuh
r] 
verb, -fired, -fir⋅ing, noun | 1. | (of an internal-combustion engine) to have a loud, premature explosion in the intake manifold. |
| 2. | to bring a result opposite to that which was planned or expected: The plot backfired. |
| 3. | to start a fire deliberately in order to check a forest or prairie fire by creating a barren area in advance of it. |
| 4. | (in an internal-combustion engine) premature ignition of fuel in the intake manifold. |
| 5. | an explosion coming out of the breech of a firearm. |
| 6. | a fire started intentionally to check the advance of a forest or prairie fire. |
backfire (on (so))
|