Noun
third age (uncountable)
(UK) The age after retirement but while one is still young enough to be active; young old age.
In the latter days of the Third Age, this Kingdom under the Mountain held one of the largest dwarvish treasure hoards in Middle-earth. Source: Internet
But here in the Third Age, Galadriel remains watchful. Source: Internet
The official setting takes place during the Second Age of Glorantha (previous editions covered the Third Age). Source: Internet
Because of their famous parents, these two are already celebrities by the time they get married in the Third Age. Source: Internet