From Longman Dictionary of Contemporary Englishfield of firefield of firePMWthe area that you can hit when you shoot from a particular position → field
Examples from the Corpus
field of fire• The first is that it preserves a clear field of fire for my missile troops.• We had a good field of fire all round in case the enemy came out of the sunken road or over the hedge.• We had triple concertina wire set up, claymores, and tripwires, and we even cut some fields of fire.• Harry blundering into the field of fire.• The best place for most artillery is on a hill commanding a wide field of fire with long clear lines of sight. 