1 lifetime, duration, length of existence; life-span:
The age of a stag is judged chiefly by its antlers. She was sixteen years of age.
2 maturity, discretion; majority, adulthood, seniority:
When he comes of age he will inherit millions.
3 period, stage, time:
Among these people, both boys and girls undergo rites of passage at the age of puberty. He is a man of middle age.
4 long time, aeon or esp. US eon; years:
I haven't seen you for an age! The noise went on for ages.
5 era, epoch, period, time:
The 18th century was known as the Augustan Age in England.
6 grow old(er), mature, ripen:
O, Matilda, I age too fast for my years! You must first age the whisky in the barrel, then bottle it.