Jean jumper: This tool is a piece of plastic designed to help the sewing machine foot work over bulky seams such as those found in jeans.

Kimono sleeves: Kimono sleeves are cut in one piece with the garment front and back.

Knife pleats: Knife pleats are more commonly called straight pleats. Knife pleats all run in the same direction; your pattern will give detailed instructions on making the pleats.

Knits: Fabrics which are knitted rather than woven. Knits have more stretch than woven fabrics; some patterns are made especially for knits.