See svelte in Webster's New World College Dictionary
adjective
slender and graceful; lithe: used chiefly of women
suave, polished, sophisticated, etc.: his svelte singing style
See svelte in American Heritage Dictionary 4
svelte
adjectivesvelt·er, svelt·est
Slender or graceful in figure or outline; slim.
Origin: French, from Italian svelto, from past participle of svellere, to stretch out, from Vulgar Latin *exvellere, from Latin ēvellere : ē, ex-, ex- + vellere, to pull.