blue jet

American  

noun

1. a faint discharge of blue light from the top of a thunderstorm cloud that propagates upward: extends approximately from the bottom to the top of the stratosphere and is not detectable from the ground.

---

blue jet Scientific  

1. A conical discharge of blue light that starts from the top of active thunderstorm clouds and proceeds upward. Blue jets can last up to several hundred milliseconds and are believed to connect the top of a thundercloud with the ionosphere.

---

Etymology

Origin of blue jet

1990–95

Example Sentences

See Examples For:

blue jet

Alas, the momentarily unidentified flying object was a red, white and blue jet half filled with 77 passengers and a crew of 7, and it was almost perfectly aligned with the Connie.

From New York Times ● Dec. 14, 2010