/ Dictionary / Index S squall line: Meaning and Definition of Find definitions for: squall' line" Pronunciation: [key] — Meteorol. Meteorol. a line or extended narrow region within which squalls or thunderstorms occur, often several hundred miles long. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. squall squally Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language