Early adolescence.

(Australia) Of the oldest age permitted to participate in a competition, and therefore ineligible to participate in its next season.

(Australia) Younger than the oldest age permitted to participate in a competition, and therefore eligible to participate in its next season.

(UK) The age after retirement but while one is still young enough to be active; young old age.

The current era, characterised by the widespread and increasing use of digital technology in society.

(intransitive) To get older; to advance in age / (transitive) To cause to become older; to imagine to be older (especially of a fictional character)

The current period of Earth history characterised by large-scale extinction of lifeforms as a result of human activity.

(US, slang, dated) A very long time.

(mythology) One of the five ages of man, the period at which semidivine and human heroes are purported to have lived, between the arrival of the Greeks to Thessaly and the Greek return from Troy.

Synonym of modern period or modern history (the period following postclassical history, in Europe known as the "Middle Ages", spanning from about 1500 to the present).