Definition of waists:
(n) :
(anatomy) The part of the body between the pelvis and the stomach.
(n) :
A part of a piece of clothing that covers the waist.
(n) :
The middle part of anything.
(n) :
The middle portion of the hull of a ship or the fuselage of an aircraft.
(n) :
(nautical) That part of the upper deck of a ship between the quarterdeck and the forecastle.
(n) :
The narrow connection between the thorax and abdomen in certain insects (e.g., bees, ants and wasps).