What does AI Director mean?

AI Director meaning in Urban Dictionary

the main feature for Valve games kept 4 Dead and Left 4 Dead 2.Supposedly it's an advanced AI that will make each play-through unique by spawning zombies at different times and places, and placing pick-up's just in which these are generally required the most.In reality the very same result is possible simply by randomising the game of zombie spawn-pointsLeft 4 Dead 2 featured the brand new and enhanced AI Director 2.0 With brand new features such as apawning even more zombies and weapons, and preventing down elements of the amount pushing players to play the video game it desires.