/ Dictionary / Index B balloon sail: Meaning and Definition of Find definitions for: balloon' sail" Pronunciation: [key] — Naut. Naut. any light, loose sail, as a jib or spinnaker, used by a yacht in light wind. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. balloonist balloon seat Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language