squall line

noun

Definition of squall line

1 : an intersection or boundary between the cold and the warm winds of an extratropical cyclone or between the cold air of an advancing anticyclone and the warm air of a cyclone : cold front

called also wind-shift line

2 : a line of squalls often 50 to 200 miles ahead of a cold front

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.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Comments on squall line

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

WORD OF THE DAY

a secret plot to overthrow a government

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Latin Quiz

  • roman forum
  • Which of the following months comes from a Latin word for “ten”?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!