- (astronomy, meteorology) an upper atmospheric optical phenomena associated with thunderstorms, large but weak luminous flashes that appear directly above an active thunderstorm system and are coincident with powerful positive cloud-to-ground lightning strokes
1999, Patricia Barnes-Svarney, Thomas E. Svarney, Skies of fury: weather weirdness around the world, Simon and Schuster:
- Red sprites flash high above thunderstorm clouds.
- blue starter
- gigantic jet
- sprite halo
- transient luminous events
- upward lightning