/ Dictionary / Index P Petrillo: Meaning and Definition of Find definitions for: Pe•tril•lo Pronunciation: (pi-tril'ō), [key] 1892–1984, U.S. labor leader: president of the American Federation of Musicians 1940–58. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. petrify Petrine Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language