noun.
A person whose hobby or profession is making quilts.
noun.
A person who uses a hand or machine stitch to decorate a quilt, or to sew together the layers of a quilt.
noun.
A person who performs the entire process of making a patchwork quilt, whether or not it is decorated with quilting stitches.
Word Usage
"It's not great - for one thing, I'm not thrilled with the word quilter as I am beginning to prefer fibre artist (nothing wrong with quilting, but I do so much that isn't quite quilting, these days), but that was two words!"