Wiktionary
n. 1 (context US English) An enlisted rank in the United States Army, of rank E-3, ranking above a private and below a corporal or specialist. 2 (context US English) An enlisted rank in the United States Marine Corps, of rank E-2, ranking above a private and below a lance corporal.
Wikipedia
Private first class (PFC) is a military rank held by junior enlisted persons.
Usage examples of "private first class".
One of the servicemen killed in the Big Tent fire was Private First Class Johnny Vernon.
In the infantry, he twice attained the rank of private first class and won the Silver Star and the Bronze Star with cluster.
Forty-five minutes later, Private First Class Bomer escorted Lemnitzer to his limousine and drove him through the darkness back to Quarters 1.
I was twenty-two and still in uniform - a private first class who had flunked out of Cornell University as a student of chemistry before going to war.
Burrows, E-Three, Private First Class, Platoon eight, 171st Infantry Brigade.
When the private first class finally determined that the black rank on the kid's BDU collar was oak leaves, he blessed his prescience.