- firing by one's own side, esp when it harms one's own personnel
WordReference Random House Unabridged Dictionary of American English © 2016
- Business[Insurance.]a fire deliberately set and remaining contained, as in a fireplace or boiler, from which any resulting loss cannot be claimed as an insurance liability (opposed to hostile fire).
- Military(in military combat) fire, as by artillery, by one's own forces, esp. when causing damage near or casualties to one's own troops.