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1.
Elemental spirit of the air. commonly faeries with wings.
Hey, look a sylph, wow!
by Jay December 02, 2004
 
2.
Woodland sprite, spirit of the forest.
She looks like a lovely sylph.
by JJW May 07, 2006
 
3.
the epitome of slim, prepubescent, female beauty.
Ballerinas strive for their bodies to be like that of a sylph - thin to the point that they appear lighter than air.
by wouldaben December 15, 2010