Definitions
1.VerbTo become very angry and irrational."The guy went ballistic when I tried to tell him he couldn't return the socks if the package had been opened."
2.Verbfor a usually rocket-powered, predominantly non-glide projectile or aerial vehicle, such as a ballistic missile, to travel to its target partly via unpowered ballistic or quasi-ballistic flight, usually following burnout of its rocket motor
3.Verbfor a powered, usually guided missile or other aerial vehicle to travel on an unguided or ballistic trajectory, having lost power, control or guidance