Mil.
an officer, acting under the officer of the day, who is responsible for the instruction, discipline, and performance of duty of the guard in a post, camp, or station. Abbr.: OG, O.G.
Mil.
an officer, acting under the officer of the day, who is responsible for the instruction, discipline, and performance of duty of the guard in a post, camp, or station. Abbr.: OG, O.G.
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012