Indirect fire means shooting something far away without actually seeing it. Imagine you want to hit a target, like a tree, but it's too far away for you to see it with your own eyes. So instead, you use something like a big gun or a missile launcher to shoot at the target. But because you can't see the target, you have to use special tools to help you aim, like maps or computer screens that show you where the target is. Once you aim the gun, you shoot it, and the projectile (like a bullet or a missile) travels through the air and hits the target. Indirect fire is often used in wars or in military training exercises, because it allows soldiers to attack targets from far away without risking their own safety.