Lewis & Short

1. clīmax, ăcis, f., = κλῖμαξ (a ladder), a rhetorical figure, consisting in a gradual increase in force of expression, a climax (pure Lat. gradatio), Mart. Cap. 5, § 536 (in Quint. 9, 3, 54, used as Greek, and transl. by gradatio).

2. Clīmax Mĕgălē = Κλῖμαξ μεγάλη, a narrow pass between Media and Asia Minor, Plin. 2, 26, 29, § 115.