/ Dictionary / Index B ballonet: Meaning and Definition of Find definitions for: bal•lo•net Pronunciation: (bal"u-nā'), [key] — n. an air or gasbag compartment in a balloon or airship, used to control buoyancy and maintain shape. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ballon d'essai* ballonné Related Content Daily Word Quiz: diurnal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language