How is "projectile" best defined?

The term "projectile" is best defined as a missile. This is because a projectile specifically refers to an object that is thrown, launched, or propelled, typically through the air, often as part of a weapon system. Projectiles can include a variety of objects, such as bullets, shells, or other forms of ammunition that are designed to hit a target upon being discharged from a weapon.

While "weapon" refers to the tool or instrument used to cause damage or harm, and "shield" indicates a protective device to block attacks, these terms do not capture the essence of what defines a projectile. "Target," on the other hand, describes the object or area that a projectile is aimed at, further distinguishing it from the primary definition of what a projectile itself is. By understanding the function and nature of a projectile, it becomes clear why "missile" is the most accurate term in this context.