sylphish adjective1 •(no longer used) Resembling or characteristic of a sylph; sylphlike.All these on a neck of snow slight-tinged with rose-bloom, and within it royal Life: amidst the blaze of lustres ; in sylphish movements, espiegleries, coquetries, and minuet-mazes[.] — 1837 formsmore sylphish · most sylphish