An air bed is an inflatable mattress for sleeping outdoors. Blow up the air bed.
Air moves inside it as you do, which is why a cold one is colder than the ground. An air bed always goes down on the second night, never the first.
1nounair bedAn inflatable mattress for sleeping outdoors.
“The air bed was flat by four in the morning.”
air bed is a bed.
Practised in Camping & Outdoors