1. the quality or state of being thin and graceful in form
2. the quality of being small in width relative to length or height

Examples

• The dancer’s natural slenderness made her perfect for ballet.
• The slenderness of the tower made it appear to reach into the clouds.
• She admired the slenderness of the young birch trees.
• The bridge’s slenderness was both elegant and structurally sound.
• The model’s slenderness was enhanced by the flowing dress.
• The slenderness of his fingers made him an excellent pianist.