What does backfire mean?
To backfire is to produce an outcome directly opposite to the one intended, usually with damaging or embarrassing consequences for the person responsible. The word began as a technical term describing a literal hazard: a fire or explosion travelling backwards through a firearm or an early combustion engine rather than forward as designed. By the nineteenth century it had acquired its now-dominant figurative meaning, so that a propaganda campaign, a legal manoeuvre, or even a well-meant compliment may all be said to backfire if they rebound on their author. The word carries a strong connotation of ironic self-defeat, which makes it a favourite of journalists and commentators describing political or commercial missteps. It is frequently intensified with adverbs such as 'spectacularly'. Both transitive-adjacent figurative use and the literal mechanical sense remain current in British and American English.
(Of a plan or action) to have an unintended and typically harmful effect that rebounds on its originator.
"The tax cut backfired, widening the deficit instead of stimulating growth."
An instance of something having an effect opposite to that intended, or a loud ignition of fuel backwards in an engine.
"We heard a loud backfire from the truck's exhaust pipe."
Used for multiple instances of unintended reversal or repeated engine misfirings.
"The engine gave off several sharp backfires as it idled."
'Backfire' began life as a literal description of gunfire exploding backwards — before it became our go-to word for plans that blow up in their makers' faces.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of backfire
Backfire originated as a compound of the native English words 'back' and 'fire', first recorded in the seventeenth century in connection with firearms and fires that spread backward against their intended direction. The literal mechanical sense — an engine igniting fuel in reverse through its intake or exhaust — developed alongside early internal-combustion technology in the late nineteenth century. The figurative sense, describing any plan whose effects rebound harmfully on its maker, became established in the twentieth century and is now the word's dominant use. Its component parts are both Germanic in origin, giving English cognates such as 'firearm' and 'fiery' through the shared root of 'fire'.
How backfire is actually used
Informal to neutral register; common in journalism and everyday speech. The figurative sense (a plan going wrong) dominates modern usage by far, while the literal engine sense survives mainly in descriptions of older vehicles or mechanical faults. Often used with intensifying adverbs such as 'spectacularly', 'badly', or 'completely'.
Easily confused with backfire
A misfire simply fails to work, while a backfire actively produces an outcome opposite to what was intended.