Dictionary

1backfire

noun back·fire \-ˌfī(-ə)r\

Definition of BACKFIRE

1
:  a fire started to check an advancing fire by clearing an area
2
:  a loud noise caused by the improperly timed explosion of fuel mixture in the cylinder of an internal combustion engine

First Known Use of BACKFIRE

1839

2backfire

verb

of an engine or vehicle : to make a loud sound when fuel is not burned properly

: to have the opposite result of what was desired or expected

Full Definition of BACKFIRE

intransitive verb
1
:  to make or undergo a backfire
2
:  to have the reverse of the desired or expected effect <their plans backfired>

Examples of BACKFIRE

  1. <my plan to throw her a surprise party backfired when she ended up sobbing that everyone had forgotten her birthday>

First Known Use of BACKFIRE

1886

Related to BACKFIRE

BACKFIRES Defined for Kids

1backfire

verb back·fire \ˈbak-ˌfīr\
back·firedback·fir·ing

Definition of BACKFIRE for Kids

1
:  to have a result opposite to what was planned <The joke backfired.>
2
:  to make a loud engine noise caused by fuel igniting at the wrong time

2backfire

noun

Definition of BACKFIRE for Kids

1
:  a loud engine noise caused by fuel igniting at the wrong time
2
:  a fire that is set to stop the spread of a forest fire or a grass fire by burning off a strip of land ahead of it

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