WordNet sense 1 (showing a high degree of refinement and the assurance that comes from wide social experience):

polished, refined, urbane

WordNet sense 2 (moving and bending with ease):

lissom, lissome, lithe, lithesome, slender, supple, sylphlike

WordNet sense 3 (characterized by beauty of movement, style, form, or execution):

graceful

WordNet sense 4 (being of delicate or slender build):

slight, slim

WordNet sense 5 (lacking excess flesh):

lean, thin