Air pressure is the weight of the atmosphere caused by the way that gravity pulls gas molecules towards the centre of the Earth. A region of high pressure is formed where air currents cause air to sink over a region of the Earth; a region of low pressure is a region where air is rising, and so reducing the normal weight of air at a place.
AIR PRESSURE
Meaning of AIR PRESSURE in English
Weather and meteorology English vocabulary. Английский словарь погоды и метеорологии . 2012