counterfire noun 2verb 1forms 3 noun2 •The firing of weapons in response.The second attack vehicle had difficulty navigating around the debris from the first attack, and was met with defensive counterfire by security personnel assigned to the hotel. — 2007 •A smaller fire lit at some distance from a wildfire, in order to develop a firebreak. verb1 •To light a smaller fire at some distance from a wildfire, in order to develop a firebreak. formscounterfired · counterfiring · counterfires