ICBM is an acronym. It stands for Intercontinental Ballistic Missile. It is a missile that can travel such distances so it can be used from one continent to another. The missile can then carry a bomb. This can be a conventional or nuclear warhead. Today, most of the time, it will be a nuclear warhead.It is a guided ballistic missile which follows a path and has a range of 5500 km.They are primarily designed for nuclear weapons delivery but can also carry chemical and biological weapons.