De office
Defined in 3 dictionaries — Ballentine's (1916), Black's (1910), Black's (1891)
Ballentine's Law Dictionary
James A. Ballentine · 1916
Of office; officially.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
I,. Fr. Of office; in virtue of office; officially; in the discharge of ordinary duty.
A Dictionary of Law
Henry Campbell Black · 1891
Fr. Of office; in virtuo of office; officially; in the discharge of ordinary duty. DE ONERANDO PRO RATA POR-