As an adjective:
* It describes something related to the motion of projectiles, especially those launched with an initial force and then moving under the influence of gravity.
* Example: "The ballistic trajectory of the rocket was calculated by engineers."
As a noun:
* It refers to the study of the motion of projectiles.
* Example: "The physics class learned about the principles of ballistic."
So, depending on the context, "ballistic" can be either an adjective or a noun.