Air Definition–noun | 1. | a mixture of nitrogen, oxygen, and minute amounts of other gases that surrounds the earth and forms its atmosphere. | | 2. | a stir in the atmosphere; a light breeze. | | 3. | overhead space; sky: The planes filled the air. | | 4. | circulation; publication; publicity: to give air to one's theories. | | 5. | the general character or complexion of anything; appearance: His early work had an air of freshness and originality. | | 6. | the peculiar look, appearance, and bearing of a person: There is an air of mystery about him. | | 7. | airs, affected or unnatural manner; manifestation of pride or vanity; assumed haughtiness: He acquired airs that were insufferable to his friends. | | 8. | Music. | b. | the soprano or treble part. | | d. | Also, ayre. an Elizabethan art song. | | | 9. | aircraft as a means of transportation: to arrive by air; to ship goods by air. | | 10. | Informal. air conditioning or an air-conditioning system: The price includes tires, radio, and air. | | 11. | Radio. the medium through which radio waves are transmitted. | –verb (used with object) | 13. | to expose to the air; give access to the open air; ventilate (often fol. by out): We air the bedrooms every day. | | 14. | to expose ostentatiously; bring to public notice; display: to air one's opinions; to air one's theories. | | 15. | to broadcast or televise. | –verb (used without object) | 16. | to be exposed to the open air (often fol. by out): Open the window and let the room air out. | | 17. | to be broadcast or televised. | –adjective | 18. | operating by means of air pressure or by acting upon air: an air drill; an air pump. | | 19. | of or pertaining to aircraft or to aviation: air industry. | | 20. | taking place in the air; aerial: air war. | —Idioms | 21. | clear the air, to eliminate dissension, ambiguity, or tension from a discussion, situation, etc.: The staff meeting was intended to help clear the air. | | 22. | get the air, Informal. | a. | to be rejected, as by a lover. | | b. | to be dismissed, as by an employer: He had worked only a few days when he got the air. | | | 23. | give (someone) the air, Informal. | a. | to reject, as a lover: He was bitter because she gave him the air. | | b. | to dismiss, as an employee. | | | 24. | in the air, in circulation; current: There's a rumor in the air that we're moving to a new location. | | 25. | into thin air, completely out of sight or reach: He vanished into thin air. | | 26. | off the air, | a. | not broadcasting: The station goes off the air at midnight. | | b. | not broadcast; out of operation as a broadcast: The program went off the air years ago. | | c. | (of a computer) not in operation. | | | 27. | on the air, | a. | in the act of broadcasting; being broadcast: The program will be going on the air in a few seconds. | | b. | (of a computer) in operation. | | | 28. | put on airs, to assume an affected or haughty manner: As their fortune increased, they began to put on airs. | | 29. | take the air, | a. | to go out-of-doors; take a short walk or ride. | | b. | Slang. to leave, esp. hurriedly. | | c. | to begin broadcasting. | | | 30. | up in the air, | a. | Also, in the air. undecided or unsettled: The contract is still up in the air. | | b. | Informal. angry; perturbed: There is no need to get up in the air over a simple mistake. | | | 31. | walk or tread on air, to feel very happy; be elated. | |
From Dictionary
Pump Definition–noun | 1. | an apparatus or machine for raising, driving, exhausting, or compressing fluids or gases by means of a piston, plunger, or set of rotating vanes. | | 2. | Engineering, Building Trades. a shore having a jackscrew in its foot for adjusting the length or for bearing more firmly against the structure to be sustained. | | 3. | Biology. an animal organ that propels fluid through the body; heart. | | 4. | Cell Biology. a system that supplies energy for transport against a chemical gradient, as the sodium pump for the transfer of sodium and potassium ions across a cell membrane. | –verb (used with object) | 5. | to raise, drive, etc., with a pump. | | 6. | to free from water or other liquid by means of a pump. | | 7. | to inflate by pumping (often fol. by up): to pump a tire up. | | 8. | to operate or move by an up-and-down or back-and-forth action. | | 9. | to supply with air, as an organ, by means of a pumplike device. | | 10. | to drive, force, etc., as if from a pump: He rapidly pumped a dozen shots into the bull's-eye. | | 11. | to supply or inject as if by using a pump: to pump money into a failing business. | | 12. | to question artfully or persistently to elicit information: to pump someone for confidential information. | | 13. | to elicit (information) by questioning. | –verb (used without object) | 14. | to work a pump; raise or move water, oil, etc., with a pump. | | 15. | to operate as a pump does. | | 16. | to move up and down like a pump handle. | | 17. | to exert oneself in a manner likened to pumping: He pumped away at his homework all evening. | | 18. | to seek to elicit information from a person. | | 19. | to come out in spurts. | —Verb phrase | 20. | pump up, | b. | to increase, heighten, or strengthen; put more effort into or emphasis on; intensify: The store has decided to pump up its advertising. | | c. | to infuse with enthusiasm, competitive spirit, energy, etc.: The contestants were all backstage pumping themselves up for their big moment. | | —Idioms | 21. | prime the pump, | a. | to increase government expenditure in an effort to stimulate the economy. | | b. | to support or promote the operation or improvement of something. | | | 22. | pump iron. iron (def. 29). | |
From Dictionary
Related topics from Britannicaheat pump
device for transferring heat from a substance or space at one temperature to another substance or space at a higher temperature. It consists of a compressor, a condenser, a throttle or expansion ...
air-conditioning
the control of temperature, humidity, purity, and motion of air in an enclosed space, independent of outside conditions.heating
Another method for heating with electricity involves the use of the heat pump. Every refrigeration machine is technically a heat pump, pumping heat from an area of lower temperature (normally the ...
pump
These can be used only to pump fluids that are good electrical conductors. The pipe carrying the fluid is placed in a magnetic field and a current passed crosswise through the fluid, so that it is ...
pump
Positive displacement pumps, which lift a given volume for each cycle of operation, can be divided into two main classes, reciprocating and rotary. Reciprocating pumps include piston, plunger, and ...
vacuum technology
This pump is mainly used on equipment for the study of clean surfaces and in radio-frequency sputtering. Capacities are available up to 190,000 cu ft per minute with an operating pressure range of ...
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The energy expended on breathing is used primarily in stretching the lung-chest system and thus causing airflow. It normally amounts to 1 percent of the basal energy requirements of the body but ...
Leslie, Sir John
Scottish physicist and mathematician who first created artificial ice.Geissler, Heinrich
German glassblower for whom the Geissler (mercury) pump and the Geissler tube are named.Hauksbee, Francis,
English instrument maker, scientist, and lecturer. He may have been a son of Francis Hauksbee the Elder. |
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