/ Dictionary / Index M mason bee: Meaning and Definition of Find definitions for: ma'son bee" Pronunciation: [key] any of numerous solitary bees, as of the family Megachilidae, that construct nests of clay. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mason Mason City Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language