What is Crease ?
Crease is (noun) 1. a fold made by ironing Trousers should have a crease in front. 2. a fold made accidentally She ironed his shirts to remove the creases. 3. (in cricket) a line marking the place where a batsman stands in front of the wicket(verb) to make folds accidentally in something After two hours in the car, my skirt was badly creased and had to be pressed.
source: Easier English, Student Dictionary Upper Intermediate Level