[ noun ] 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"
Used in print(Raymond C. Binder et al., editors, Proceedings...)
Inflow of air from the surrounding atmosphere was prevented by the two disks shown in figure 2 .
Argon was also blown at low velocities ( mass flow_rate **f ) through a tube coaxial with the cathode as an additional precaution against contamination of the arc by air .
To reduce heat transfer from the hot gas to this anode holder outside the region of the arc , a carbon shield was attached to the surface providing an air gap of 1/16 inch between the plate and the surface of the anode holder .(LeRoy Fothergill, "Biological Warfare", in Peter...)
For_example , bright sunlight is rapidly destructive for living microorganisms suspended in air .(M. Yokoyama et al., "Chemical and serological...)
For protein identification , fractions from the column were concentrated by pervaporation against a stream of air at 5 ` C or by negative pressure dialysis in an apparatus which permitted simultaneous concentration of the protein and dialysis against isotonic saline .
[ noun ] (transportation) travel via aircraft
"air travel involves too much waiting in airports" "if you've time to spare go by air"
[ noun ] the region above the ground
"her hand stopped in mid air" "he threw the ball into the air"
Used in print(Chicago Daily Tribune...)
He conjures herds of deer , and wild birds crowding the air .(William G. Pollard, Physicist and Christian....)
For all involved in this discussion the devil is a real entity who can really be confronted in the woods on a dark night , the demon world is populated with real creatures , and witches actually can be seen flying through the air .(Bonnie Prudden, "The Dancer and the Gymnast"...)
He then pushes his seat into the air and the teacher guides it over .
When the child raises his seat into the air , the teacher takes_hold under both sides of the pelvis ; then no_matter_what_happens , the child 's performance will be controlled .(Frank Oppenheimer, "Science and Fear-- A Discussion...)
We have ample light when the sun sets ; the temperature of our homes is independent of the seasons ; we fly through the air , although gravity pulls us down ; the range of our voice ignores distance .
[ noun ] a distinctive manner
"an air of mystery"
Used in print(Doris Miles Disney, Mrs. Meeker's Money....)
At_first_glance , not much of a motive for a man of his standing ; but for all his air of affluence , who could tell what his private financial picture was ?(Jay Williams, The Forger....)
He also had , at_times , an uncanny absent-minded air like a sleepwalker ; he would look right through you while you were talking to him , and if you said , `` For_Christ's_sake , Donald , you 've got Prussian_blue all_over your shirt '' , he would smile , and nod , and an hour later the paint would be all_over his pants as_well .
[ noun ] (meteorology) a slight wind (usually refreshing)
"the breeze was cooled by the lake" "as he waited he could feel the air on his neck"
Used in print(Ralph J. Salisbury, "On the Old Santa Fe Trail...)
Cool air moving slowly through the open or smashed out side windows hinted of blooming roadside vegetation , and occasionally a faint fragrance of perfume swirled from the back seat .
[ noun ] a distinctive but intangible quality surrounding a person or thing
: "an air of mystery" "the house had a neglected air" "an atmosphere of defeat pervaded the candidate's headquarters" "the place had an aura of romance"
Used in print(Louis Zara, Dark Rider....)
She was so beautiful with her rosy mouth and haughty air that she had to be wicked .(Arthur Miller, "The Prophecy," in The Best...)
This air of disengagement carried_over to his apparent attitude toward his things , and people often mistook it for boredom in him or a surrender to repetitious routine .
There was an air of blindness in her gray eyes , the startled horse look that ultimately comes to some women who are_born at the end of an ancestral line long_since divorced from money-making and which , besides , has kept its estate intact .(E. Lucas Myers, "The Vindication of Dr. Nestor,"...)
The doctor , with the air of a man whose professional interests have found scope , drew Alex 's attention to those excellences which might otherwise have escaped him : the fine color in comb and wattles , the length and quality of neck and saddle_hackles , the firm , wide spread of the toes , and a rare justness in the formation of the ear lappets .(Whit Masterson, Evil Come, Evil Go....)
The usual congratulatory crowd was conspicuously absent ; the place had the air of a morgue .
[ noun ] where the air is unconfined
"he wanted to get outdoors a little" "the concert was held in the open air" "camping in the open"
Used in print(Christopher Davis, First Family....)
`` I think by the end of next week he could get_out in the air a_little .
[ noun ] nowhere to be found in a giant void
"it vanished into thin air"
[ adjective ] relating to or characteristic of or occurring in the air
"air war" "air safety" "air travel"
Used in print(Booton Herndon, "From Custer to Korea, The 7th Cavalry"...)
Artillery and air strikes were called_in to kill them by the hundreds .(87th Congress, 1st Session. Congressional Record....)
The causes of the decline of the commuter railroads are many and complex - high taxes , losses of revenue to Government subsidized highway and air carriers , to name but two .
Another strategy - bolder and tougher - was also attracting notice in Washington : a naval and air blockade to cut Cuba off from the world , destroy Castro .(Public Papers of the Presidents of the U.S. D. D....)
The forces to be supported include an Army of 14 divisions and 870000 men ; a Navy of 817 active ships and 619000 men ; a Marine_Corps of 3 divisions and 3 air wings with 175000 men ; and an Air_Force of 91 combat wings and 825000 men .
A substantial increase is estimated in the cost of operating additional communications_systems in the air defense_program , as_well as in all programs where speed and security of communications are essential .
[ noun ] (music,fine art) a succession of notes forming a distinctive sequence
"she was humming an air from Beethoven"
[ verb ] expose to warm or heated air, so as to dry