Primitive Quilt ???

What is a Primitive Quilt?  Is it an old patchwork or folk art and applique.  I'm in a search to find out.  To help in my discovery of primitive, I found the
Folk Art Museum of New York a wonderful place to look at beautiful quilts from years gone by.  You may want to stop by.  What do you consider a Primitive Quilt? The style, the color, an old quilt block pattern???   These next few days I will be looking at my bits and pieces and trying to create a Primitive Quilt.
Happy Quilting!