/ Dictionary / Index Y yrbk.: Meaning and Definition of Find definitions for: yrbk. Pronunciation: [key] yearbook. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. yr. yrs. Related Content Daily Word Quiz: frowzy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language