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
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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>

First Known Use of BACKFIRE

1886

Related to BACKFIRE

BACKFIRE 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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