back fire

== English == === Alternative forms === backfire, back-fire === Etymology === From back +‎ fire. === Noun === back fire (plural back fires) A small, controlled fire set in the path of a larger uncontrolled fire, in order to limit the spread of the large fire by removing its fuel. An explosion produced either by a running internal combustion engine that occurs in the air intake or exhaust system rather than inside the combustion chamber or unburned fuel or hydrocarbons ignited somewhere in the exhaust system. ==== Translations ==== === Anagrams === fireback