mannequin

noun4

1. •
   A dummy, or life-size model of the human body, used for martial arts training or the fitting or displaying of clothes.

   • There was a time when a mannequin was the sculptural equivalent of fashion model. Like a fashion model, the mannequin was intended to reflect our social, professional and aesthetic aspirations. — 2013
2. •
   A jointed model of the human body used by artists, especially to demonstrate the arrangement of drapery.
3. •
   An anatomical model of the human body for use in teaching of e.g. CPR.
4. •
   (old-fashioned) A person who models clothes.

   • […]all of which made a perfect neutral background for the mannequins who moved around swiftly, gracefully, exhibiting one glorious creation after another. — 1951