Fuller on a Weapon
A fuller is a groove positioned into the surface of a blade in order to lighten the blade. The loss in strength of the blade is reduced as the centre of a blade does not significantly undergo either tension or compression during a cutting stroke.
Fuller as a Craft
Fulling is part of the process of preparing woolen cloth. The craft was referred to by other names in England at various times. In the Register of the Freemen of York for instance, there are many entries for "walkers," who practiced the craft.