Crossfire is when weapons are being fired from different directions, crossing the same general area. Getting caught in crossfire during a shootout can be deadly.
Crossfire is a situation that comes up when gangsters and police officers are shooting at each other, or in a war during a battle between enemies. A figurative type of crossfire is much more common: the back-and-forth of strenuous arguments, debate, or controversy. You might, for example, find yourself caught in the crossfire of your best friends' feud. The word dates from the 18th century.