Qu'est-ce qu'un projectile? Qu'est-ce qu'un projectile? A fired, thrown, or otherwise propelled object, such as a bullet, having no capacity for self-propulsion.A self-propelled missile, such as a rocket.Capable of being impelled or hurled forward.Driving forward; impelling: a projectile force. Zoology Capable of being thrust outward; protrusile.