blue jet


Definition of blue jet

  1. :  a rare form of electrical discharge that is emitted from the top of a cumulonimbus cloud during a thunderstorm as a large upward jet of blue light Wescott and Sentman discovered that sprites are salmon-colored, and as they flew with Tobolski over the Arkansas storm that summer, they discovered that sprites were not alone above the clouds: fountains of blue light emerged directly from the clouds as well. These they named blue jets. — Elwood Norris, Discover, July 1997 Blue jets, by far the rarest member of the menagerie, shoot up from cloudtops at speeds of more than 60 miles a second to heights of 30 miles. — Karen Wright, Scientific American, Spring 2000

Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!


First Known Use of blue jet


Seen and Heard

What made you want to look up blue jet? Please tell us where you read or heard it (including the quote, if possible).


quaintly unconventional or refined

Get Word of the Day daily email!