| Word | Description |
| Lap-quilting | hand quilting that is done while holding the quilt loosely in your lap without using a hoop. |
| Lattice | strips of fabric set between blocks and separate the blocks in a quilt. |
| Lengthwise grain | the threads of fabric that run parallel to the selvedge (the length) of the fabric |
| Lockstitch | a stitch made by a sewing machine when you sew several very short stitches or sew stitches in place which serves the same purpose as a knot. |
| Loft | the thickness of batting. Low loft is batting that isn't very puffy, while high loft batting is fairly thick and puffy. |
| Log Cabin | a popular quilt block that is sewn together beginning with a center square (often either red or yellow) and made larger by adding rectangular 'logs' onto the sides in a particular sequence. Usually one side of the block is made with light fabrics and the other side is made using dark fabrics. |
| Long-arm quilting machine | a special sewing machine that is used for machine quilting a quilt. The quilt is held taut on a large frame while the machine arm moves freely allowing the operator to create a quilting design on the quilt using free motion. |