/ Dictionary / Index B bobbin and fly frame: Meaning and Definition of Find definitions for: bob'bin and fly' frame" Pronunciation: [key] a roving machine used in the final stages of converting spun cotton fiber into yarn. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bobbin Bobbin and Joan 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