a lively or heated interchange of ideas and opinions
"The town hall meeting turned into a crossfire when both sides began shouting over each other's arguments about the new tax policy."
fire from two or more points so that the lines of fire cross
"The squad took cover behind a ridge to avoid getting caught in the enemy's crossfire as they advanced through the valley."
Lines of fire from multiple positions that cross in a small region
"The soldiers took cover behind the rubble as they were caught in the deadly crossfire between opposing troops on opposite hillsides."