it is rumored that at first, stone masons had secret meetings and held secrets of the labor. Eventually, they started accepting other people to their meetings, from different work backgrounds ... Since it wasn't restricted to stone masons anymore, this was changed to become "free masonry"

Masonry is another word for stone or brickwork

Binding stone in stone masonry is when binding material is used while laying stones. Stone masons size, cut and lay stones with or without binding material being used.

There are a few different types of masonry work. The types of masonry work are veneer, dry set masonry, solid masonry, brick masonry, concrete block, a-jacks, stonework, gabions, and bagged concrete.

An ashlar is a large cuboid stone, or masonry making use of such stone blocks.