How do you spell Fitter

Available Definitions:
1)  n. - One who fits or makes to fit;
2)  n. - One who tries on, and adjusts, articles of dress.
3)  n. - One who fits or adjusts the different parts of machinery to each other.
4)  n. - A coal broker who conducts the sales between the owner of a coal pit and the shipper.
5)  n. - A little piece; a flitter; a flinder.