dark age noun2 •A time period characterized by ignorance, decline, stagnation, and/or conflict and turmoil.It is not becoming in us to cast reproach upon those who lived in the daybreak of a dark age, for not seeing clearly all that we see in the more perfect day. — 1849 •A time period about which there is very little information.By his summary treatment he suggests that, for him too, the period after the coming of the Dorians was a dark age, in the limited sense that he knew no more about it than anyone else. — 2017 formsdark ages