Air Definition & Meaning - Merriam-Webster
The meaning of AIR is the mixture of invisible odorless tasteless gases (such as nitrogen and oxygen) that surrounds the earth; also : the equivalent mix of gases on another celestial object (such as a planet). How to use air in a sentence. Synonym Discussion of Air.
AIR | English meaning - Cambridge Dictionary
AIR definition: 1. the mixture of gases that surrounds the earth and that we breathe: 2. the space above the…. Learn more.
Air - Simple English Wikipedia, the free encyclopedia
Air is a mixture of many gases and tiny dust particles. It is the clear gas in which living things live and breathe. It has an indefinite shape and volume. It has mass and weight, because it is matter. The weight of air creates atmospheric pressure. There is no air in outer space.
AIR | definition in the Cambridge English Dictionary - Cambridge …
AIR meaning: 1. the mixture of gases that surrounds the earth and that we breathe: 2. the space above the…. Learn more.
AIR definition and meaning | Collins English Dictionary
Air is the mixture of gases which forms the earth's atmosphere and which we breathe. He opened the window and leaned out into the cold air. American English : air / ˈɛər /
Air | Composition, Oxygen, Nitrogen | Britannica
Air, mixture of gases comprising the Earth’s atmosphere. The mixture contains a group of gases of nearly constant concentrations and a group with concentrations that are variable in both space and time.
Definition of Air in Science - ThoughtCo
2019年11月29日 · Air is the general name for the mixture of gases that makes up the Earth's atmosphere. This gas is primarily nitrogen (78%), mixed with oxygen (21%), water vapor (variable), argon (0.9%), carbon dioxide (0.04%), and trace gases. Pure air has no discernible scent and no color.
air noun - Definition, pictures, pronunciation and usage notes
Definition of air noun from the Oxford Advanced Learner's Dictionary. [uncountable] the mixture of gases that surrounds the earth and that we breathe. Let's go out for some fresh air. He stood outside, breathing the cold night air. She was gasping for air as she ran out of the burning house. I need to put some air in my tyres.
AIR Definition & Meaning - Dictionary.com
a mixture of nitrogen, oxygen, and minute amounts of other gases that surrounds the earth and forms its atmosphere. a stir in the atmosphere; a light breeze. The planes filled the air. to give …
Air - definition of air by The Free Dictionary
air - a mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of; "air pollution"; "a smell of chemicals in the air"; "open a window and let in some air"; "I need some fresh air"