Definition of floaty:
(adj) :
Tending to float on a liquid or to rise in air or a gas; buoyant.
(n) :
(chiefly US) A lilo (inflatable air mattress) or similar object that floats on water and can be lain or sat on.
(n) :
(chiefly US) (swimming, chiefly in the plural) Synonym of armband (“one of a pair of inflatable plastic bands, normally worn on the upper arms, to help the wearer (often a child) float in water and learn to swim”).
(adj) :
(figurative) Of music: light and relaxing.
(adj) :
(figurative) Of an object: light and flimsy or soft; specifically, of a dress: lightweight, so as to rise away from the body when the wearer is moving.
(adj) :
(figurative) Of a person: feeling calm, dreamy, happy, etc., as if floating in the air.