(literally) Air that has been heated, especially so as to function as the lifting agent of a hot-air balloon. / (idiomatic) Empty, confused, or exaggerated talk lacking meaning or substance; bluster.

(idiomatic) Talking a lot, especially without saying anything of value or meaning.

Alternative spelling of hot-air balloon

A balloon-shaped aircraft whose bag is inflated with hot air; it carries passengers and crew in a gondola slung underneath.

plural of hot-air balloon

plural of hot air balloon