cloud - a visible mass of water or ice particles suspended at a considerable altitude

physical phenomenon - a natural phenomenon involving the physics of matter and energy

air hole, air pocket, pocket - a local region of low pressure or descending air that causes a plane to lose height suddenly

aurora - an atmospheric phenomenon consisting of bands of light caused by charged solar particles following the earth's magnetic lines of force

condensate, condensation - atmospheric moisture that has condensed because of cold

front - (meteorology) the atmospheric phenomenon created at the boundary between two different air masses

greenhouse effect - warming that results when solar radiation is trapped by the atmosphere; caused by atmospheric gases that allow sunshine to pass through but absorb heat that is radiated back from the warmed surface of the earth

inversion - the layer of air near the earth is cooler than an overlying layer

storm, violent storm - a violent weather condition with winds 64-72 knots (11 on the Beaufort scale) and precipitation and thunder and lightening

atmospheric electricity - electrical discharges in the atmosphere

midnight sun - the sun visible at midnight (inside the arctic or antarctic circles)

halo - a circle of light around the sun or moon

meteor shower, meteor stream - a transient shower of meteors when a meteor swarm enters the earth's atmosphere

sunrise - atmospheric phenomena accompanying the daily appearance of the sun

sunset - atmospheric phenomena accompanying the daily disappearance of the sun

afterglow - a glow sometimes seen in the sky after sunset

atmospheric condition, weather, weather condition - the meteorological conditions: temperature and wind and clouds and precipitation; "they were hoping for good weather"; "every day we have weather conditions and yesterday was no exception"