/ Dictionary / Index B bolson: Meaning and Definition of Find definitions for: bol•son Pronunciation: (bōl-sōn'), [key] — n. a desert valley, the level of which has been raised by aggradation, usually draining into a playa. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Bolshy bolster 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