- Dangerous weather feature - Electrical discharge in the atmosphere - Storm flash - A discharge of atmospheric electricity, accompanied by a
vivid flash of light, commonly from one cloud to another, sometimes
from a cloud to the earth. The sound produced by the electricity in
passing rapidly through the atmosphere constitutes thunder. - The act of making bright, or the state of being made
bright; enlightenment; brightening, as of the mental powers. - Lightening.