a knowledge domain that you are interested in or are communicating about; "it was a limited domain of discourse"; "here we enter the region of opinion"; "the realm of the occult"
territory over which rule or control is exercised; "his domain extended into Europe"; "he made it the law of the land"
the set of values of the independent variable for which a function is defined
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"
medium for radio and television broadcasting; "the program was on the air from 9 til midnight"; "the president used the airwaves to take his message to the people"
the region above the ground; "her hand stopped in mid air"; "he threw the ball into the 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"
once thought to be one of four elements composing the universe (Empedocles)
expose to warm or heated air, so as to dry; "Air linen"
broadcast over the airwaves, as in radio or television; "We cannot air this X-rated song"
be broadcast; "This show will air Saturdays at 2 P.M."
relating to or according to or affecting a symptom or symptoms; "symptomatic relief"; "symptomatic treatment"; "a symptomatic classification of diseases"
absolutely required and not to be used up or sacrificed
absolutely necessary; vitally necessary; "essential tools and materials"; "funds essential to the completion of the project"; "an indispensable worker"
being or relating to or containing the essence of a plant etc; "essential oil"