Waistline
Part of speech: noun
Definition: a line around the body at the waist; its measurement the narrowest part of a garment, usually at the waist, but may be above or below depending on the dictates of fashion or the whim of the designer person having a large waistline
Waist
Part of speech: noun
Definition: The part of the body between the pelvis and the stomach.A part of a piece of clothing that covers the waist.The narrow connection between the thorax and abdomen in certain insects (e.g., bees, ants and wasps).The middle portion of the hull of a ship or the fuselage of an aircraft.
Example sentence: When I started working on 'Battlestar Galactica' in Canada, I was told to get as fit as a marine for my character Lee 'Apollo' Adama. So I did. But now I have a problem with suits, because I'm 5 ft. 9 in. with a 40 inch chest and a 31 inch waist, so I'm rather too big for that very tailored British look, and they always have to be altered.