Definition of “float” - Learner’s Dictionary

float

verb uk us /fləʊt/
LIQUID [ I, T ]

B1 to stay on the surface of a liquid instead of sinking, or to make something do this:

I like floating on my back in the pool.
AIR [ I ]

B1 to stay in the air, or move gently through the air:

A balloon floated across the sky.
BUSINESS [ I, T ]

to start selling a company's shares to the public

(Definition of “float verb” from the Cambridge Learner's Dictionary © Cambridge University Press)