What does it mean to dance and spin around in a plain dress?

Pronunciation: sù yī wǔ mèi piān xiān

Wearing a white dress and dancing lightly.

Related Example Sentences:

含吐缃缥之上,翩动樽樽之侧.

Brothers and sisters dancing. --Liu Yazi, "Raccoon Stream Sand"

Dreaming of a Taoist priest, dancing in his feathered clothes, passing under the Lingao. --Song Su Shi, "After the Red Cliff Fugue"