/ Dictionary / Index B borasca: Meaning and Definition of Find definitions for: bo•ras•ca Pronunciation: (bu-ras'ku), [key] — n. (esp. in the Mediterranean) a squall, usually accompanied by thunder and lightning. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Borås borate Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language