Breadcrumb Home > Dictionary > Index C chief petty officer: Meaning and Definition of Find definitions for: chief' pet'ty of"ficer Pronunciation: [key] — U.S. Navy and Coast Guard. U.S. Navy and Coast Guard. a noncommissioned rank above petty officer first class and below senior petty officer. Abbr.: CPO, C.P.O., c.p.o. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. chief of state chieftain TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: oungurk Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language