95dc162e_Glossary_of_Dance_Terms__m_Dance_Dictionary_from_Webref
Shape
The use of sway, side stretch, and/or body rotation to focus your body more toward or more away from your partner. It is usually a small change in the relative positioning of your partnership to enhance or to extend a picture figure or to flow more smoothly into the next figure. It is a way to continue to "dance" through a section of music where you are not taking steps. Again, it is a small action, a feature of styling. If you don't do it, that won't interfere with your continuing to dance.
Glossary of Dance Terms
Description Glossary of Terms and Abbreviations from BallroomDancers.com Dance Dictionary from Webref