From Longman Dictionary of Contemporary Englishfirebreakfire‧break /ˈfaɪəbreɪk $ ˈfaɪr-/ noun [countable] TAFa narrow piece of land where all the plants and trees have been removed, made to prevent fires from spreading
Examples from the Corpus
firebreak• Using a firebreak as a foot path, the men moved up the 1,350-foot peak. 