chief petty officer

noun U.S. Navy and Coast Guard.
  1. a noncommissioned rank above petty officer first class and below senior petty officer. Abbreviation: CPO, C.P.O., c.p.o.

Origin of chief petty officer

An Americanism dating back to 1885–90
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British Dictionary definitions for chief petty officer

chief petty officer

noun
  1. the senior naval rank for personnel without commissioned or warrant rankAbbreviation: CPO
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012