backfire

1 of 2

verb

back·​fire ˈbak-ˌfī(-ə)r 

backfired; backfiring; backfires

intransitive verb

1

: to have the reverse of the desired or expected effect

their plans backfired

2

: to make or undergo a backfire

backfire

2 of 2

noun

1

: a loud noise caused by the improperly timed explosion of fuel mixture in the cylinder of an internal combustion engine

2

: a fire started to check an advancing fire by clearing an area

Synonyms

Verb

• boomerang

Examples of backfire in a Sentence

Verb

my plan to throw her a surprise party backfired when she ended up thinking that everyone had forgotten her birthday

Recent Examples on the Web

Verb

Matt Blunt, head of the American Automotive Policy Council, said the industry agrees with Trump's push for domestic manufacturing but warned that supply chain changes take time and broad tariffs could backfire. —Amanda Castro, MSNBC Newsweek, 15 Apr. 2025

An interference attempt by El Grande Americano backfired as Mysterio picked up the win over Creed. —Alfred Konuwa, Forbes.com, 14 Apr. 2025

Noun

Attempts to adopt best practices without risk-taking and struggle backfire. —Doug Sundheim, Forbes, 18 Jan. 2025

Will Indonesia’s ‘scare tactics’ backfire? —Dylan Butts, CNBC, 17 Dec. 2024

Word History

First Known Use

Verb

1852, in the meaning defined at sense 2

Noun

1801, in the meaning defined at sense 2

Rhymes for backfire

• admire
• afire
• aspire
• esquire
• expire
• haywire
• hellfire
• inquire
• inspire
• newswire
• perspire
• rehire

Kids Definition

backfire

1 of 2 noun

back·​fire -ˌfī(ə)r 

1

: a fire that is set to check the spread of a forest fire or a grass fire by burning off a strip of land ahead of it

2

: a loud noise caused by the improperly timed explosion of fuel in the cylinder of an internal combustion engine

backfire

2 of 2 verb

1

: to make a backfire

2

: to have a result opposite to what was planned

their plans backfired