2. The angular distance; usually measured in degrees, above the horizon, from zero degrees at the horizon to 90 degrees at the zenith.
One of the two co-ordinates (the other being azimuth) that define a celestial object's position, used with an altazimuth mount.
The aircraft was flying at an altitude of 9,000 feet or 2.74 kilometers.2. A place or region situated high above sea level: The aircraft was trying to avoid the lightening and strong winds by flying at a higher altitude above the thunderstorm.
3. Etymology: from Latin altitudo, from altus, "high" + -tude, "quality, condition of".
2. Ottic barotrauma caused by abrupt atmospheric pressure changes; such as, may affect the crew and passengers of aircraft during flight, particularly during descent.
3. Inflammation of the ear caused by pressure changes when auditory tubes are obstructed which occurs commonly in aviators and divers.
"A lack of oxygen causes headache, shortness of breath, malaise, decreased ability to concentrate, lack of judgment, lightheadedness, fainting, and when it is severe, death."
"The beginning indicator of altitude sicknesses may be euphoria, meaning individuals are unaware of the cause of the problem; so, it is important that people live in high altitudes for a period of weeks, or even months, in order to safely adapt to the high altitude conditions."