A natural electrical discharge of very short duration and high voltage between a cloud and the ground or within a cloud, accompanied by a bright flash and typically also thunder.
The storm was fierce, with lightning illuminating the sky every few seconds.
The occurrence of a natural electrical discharge in the atmosphere.
Lightning can be dangerous, so it's important to stay indoors during a thunderstorm.
A vivid flash or bolt of light produced by a lightning discharge.
A sudden lightning lit up the valley, revealing the distant mountains.