(history) The period of primarily European history between the decline of the Western Roman Empire (antiquity) and the early modern period or the Renaissance; the time between c. 500 and 1500.

Synonym of prehistory: the era before written records.

Being of an age during which attendance at school is customary.

plural of prehistoric age

the period of life between youth and old age; midlife

(historical) A historical period of great accomplishment in a field or a society, usually following, and not quite as favorable as, a golden age, and not unfavorable as an iron age.

Belonging in the Stone Age.

(idiomatic) To reach a specific age where one is legally considered to be an adult. / (idiomatic) To mature, or become fully developed.

A therapy or process which reverses the physiological aging process.

(mythology) The most recent and debased of the four or five classical Ages of Man; hence, any period characterized by wicked behavior. / An age characterized by the use of iron.