an enlisted man ranking just below a corporal in the U.S. Army and just below a lance corporal in the U.S. Marine Corps: abbrev. PFC or Pfc
See private first class in American Heritage Dictionary 4
nounpl.privates first class
Abbr. PFC A noncommissioned rank in the U.S. Army that is above private and below corporal or in the U.S. Marine Corps that is above private and below lance corporal.