/wayst"luyn'/ , n.
1. the circumference of the body at the waist: exercises to reduce the waistline.
2. the part of a garment that lies at or near the natural waistline, as the seam where the skirt and bodice of a dress are joined.
3. an imaginary line encircling the waist.
[ 1895-1900; WAIST + LINE 1 ]