Definition from Wiktionary, the free dictionary
- Air that has been heated, especially so as to function as the lifting agent of a hot-air balloon.
- The balloon was equipped with a burner to create hot air for lift.
- Empty, confused or exaggerated talk having no meaning or substance.
- After the parade, Phil said he was going to enlist in the army, but I could tell it was just hot air, so I didn't worry.