A "floaty dress" refers to a loose, lightweight, and flowing dress that makes the person wearing it appear as if they are floating or moving gracefully. Full definition
I've only had a few floaty dresses like this in my life, so when I wear it, I feel like a princess. (sharingajourney.com)
We're crushing on floaty dresses this season and this skater dress is no. 1 on our hitlist. (prettylittlething.com)
I adore this black maxi floaty dress from Japonica, with the right amount of layering I can wear it from summer through to winter. (myfashionslashlife.com)