Justīnus, i, m., Justin. A Roman historian in the second century of the Christian era, who made an abstract of the historical work of Trogus Pompeius.

— Justinus I., a Roman emperor of low birth (a swine-herd) in the sixth century of the Christian era.

— Justinus II., a Roman emperor in the latter half of the sixth century.

—Hence, Justīniānus, a, um, adj., of or belonging to the emperor Justin: labores, Coripp. Laud. Just. 1, 263.

— A philosopher who defended the Christians under Antoninus Pius, called also Justin Martyr, Hier. Ep. 70, 4 al.