airless

Everyday

1. With no fresh air moving; stuffy and hard to breathe in: «an airless room». tree →
2. With no air at all: «the airless surface of the Moon». tree →
3. (of weather) Very still, with no wind. tree →

In the lessons

In science lessons, the Moon is airless, so there is no wind, no sound and no breathing without a spacesuit. In everyday life an airless room needs a window opened. In stories an airless place feels hot, heavy or scary.

Examples

• The classroom was hot and airless, so we opened the windows. tree →
• The Moon is airless, so astronauts carry oxygen. tree →
• It was an airless summer night. tree →
• The cellar was dark and airless. tree →
• Sound cannot travel in airless space. tree →
• We felt sleepy in the airless bus. tree →
• Now, that night happened to be very hot and airless, and the prince, after vainly trying to rest, at length got up and went to the window. tree →

Note

The suffix -less means «without»: airless = without air. Do not confuse with «airtight» (no air can get in or out). Opposite: airy, breezy.