2. Atmosphere, stratosphere, sky: "The rocket blasted off into the air."
3. Wind, breeze, draft, air current, air flow, waft: "Cold air blew in through the open window."
4. Atmosphere, aura, ambience; quality, manner, style, look: "An air of mystery pervaded the abandoned house. She has a certain air of sadness all the time."
5. Airs, affectations, pretensions, artificial manners; haughtiness, arrogance: "Don’t put on airs with me."
6. Tune, ditty, melody, song, strain; ballad, carol: "The children sang a delightful air."
7. Ventilate, expose to air, aerate: "The blankets were aired outside on the line."
8. Voice, express, declare, utter; proclaim, make public, reveal, disclose, expose: "The presidential candidate aired his views on television."
2. Biosphere, stratosphere, sky: The rocket blasted off into the air.
3. Wind, breeze, draft, current: When Andrea Gill opened the window, cold air blew in through the open window.
This is an old-fashioned or a literary term.
2. To deviate from an established moral code; to transgress, sin, misbehave: To err is human, to forgive divine.
2. A person who succeeds or is in line to succeed to a hereditary rank, title, or office: The king did not have an heir when he died.
An heir is someone who may be worth more financially than others and still be worthless.
Angie, the heir to the science project started to err when she wrote that ere there was air, the earth was surrounded by carbon dioxide.
In ancient times, the name used for a gas.2. The mixture of gases that make up the earth's atmosphere.
The principal gases that compose dry air are: Nitrogen, 78.09%; Oxygen, 20.95%; Argon, 0.93%; and Carbon Dioxide, 0.033%.
Another important constituent of air is water vapor which varies from 0% to about 4%.
The air mass is an indication of the length of the path solar radiation travels through the atmosphere. An air mass of 1.0 means the sun is directly overhead and the radiation travels through one atmosphere (thickness).
Air sacs also give buoyancy to aquatic insects, and in dragonflies, it provides insulation around the thoracic wing muscles.
"In 1695, Guillaume Amontons, designed a thermometer using a glass tube filled with compressed air and then topped off with a level of mercury."
Brenda's father took his rifle out to go hunting for deer.2. A BB gun that uses compressed air or gas to fire small pellets: Lucinda's young brother took his air rifle to shoot at some cans lined up on a fence.
3. A weapon that can shoot many bullets quickly and which is designed for use by the military: A unit of soldiers were armed with assault rifles and they were having target practice with these weapons.