(n): (usually in the plural) a garment extending from the waist to the knee or ankle, covering each leg separately
(n): heavy-duty clothes for manual or physical work
(n): a coarse durable twill-weave cotton fabric
(n): artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers
Also "Oh Jean," a great (if weird) song by the Proclaimers, and "5 Green Queens & Jean" by the Pogues.
Jean by Oliver went to #2 on the Billboard Hot 100 in 1969. This is a song from the soundtrack of the film The Prime of Miss Jean Brodie and was written by Rod McKuen who also recorded it.