That part of the human body which is immediately below the ribs or thorax; the small part of the body between the thorax and hips.
I am in the waist two yards about.
Hence, the middle part of other bodies; especially (Naut.), that part of a vessel's deck, bulwarks, etc., which is between the quarter-deck and the forecastle; the middle part of the ship. (Naut.)
A garment, or part of a garment, which covers the body from the neck or shoulders to the waist line.