/ Dictionary / Index Y yellowback: Meaning and Definition of Find definitions for: yel•low•back Pronunciation: (yel'ō-bak"), [key] — n. (formerly) an inexpensive, often lurid, novel bound in yellow cloth or paper. a gold certificate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. yellow avens yellow-bellied Related Content Daily Word Quiz: ontiguous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language