A blanket on your bed that contains a decorative series of interlocking square fabric pieces on one side, a batting in the middle for warmth and a flat fabric backing on the other side is an example of a quilt.
When you take a bunch of different squares of fabric and you sew them together in a pretty pattern to make a bed covering, this is an example of when you quilt.
Quilt a skirt.
To quilt a potholder.
Origin of quilt
- Middle English quilte from Anglo-Norman from Latin culcita mattress
From American Heritage Dictionary of the English Language, 5th Edition