un ballon à air chaud is a hot air balloon in French.
Ballon means either 'balloon' (a hot-air balloon) or 'ball' (at least the size of the handball one).
Deflate is to allow air to escape from a balloon.
A balloon at a children's party is 'un ballon'. A hot-air balloon is 'une Montgolfiere'.
the french men
the hot-air balloon
Une Montgolfière
the Montgolfier brothers
Ballooning means "ascending in a balloon", "rising high in the air, similar to a balloon", or "growing rapidly, such as a balloon".
When a balloon floats towards you, it means that the air inside the balloon is less dense than the air surrounding it, causing it to rise and move in your direction.
If the volume of the air inside a balloon increases while the mass remains constant, the density of the air inside the balloon will decrease. This means that the air inside the balloon will become less dense.
A hot air balloon does not have any mean of steering and does not have permanent flotation. An airship has a permanent means of flotation (lighter than air gas bags) and a means of propulsion.
The word "deflated" means that all of the air or gas has been let out. So, a deflated balloon is one that no longer has any air in it.