Definition of the dark ages noun from the Oxford Advanced American Dictionary

     

    the dark ages

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  1. 1 the Dark Ages the period of European history between the end of the Roman Empire and the 10th century A.D.
  2. 2 (often humorous) a period of history or a time when something was not developed or modern Back in the dark ages of computing, in about 1980, they started a software company. You're living in the dark ages, Mom!
See the Oxford Advanced Learner's Dictionary entry: the dark ages