Crowd Control generally refers to something that keeps an enemy unit from doing anything. This means Polymorph, Shackle, Sap, Fear, Seduce, Repentance, Turn Undead, Cyclone, Banish, Sleep, Wyvern Sting, Freezing Trap, among others. Usually the leader will place a target mark on the head of the enemy and tell you that a particular symbol is for your type of CC, and you should use your CC ability on that target when combat begins.
Kathy, I said, "I'm lost" though I knew she was sleeping
I'm empty and aching and I don't know why
Counting the cars on the New Jersey Turnpike
They've all gone to look for America