- foreign service officer.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for fso
“For any FSO, being at work is the essence of everything, and being deprived of that and being cast out was devastating,” he said.Exclusive: Hillary’s Benghazi ‘Scapegoat’ Speaks Out
May 20, 2013