the length of time a person has lived or a thing existed
the time of life at which some particular qualification, power, or capacity arises
a voting age of 18
a stage of life
a generation
the ages to come
a period of past time dominated by a central figure or prominent feature or activity
the age of Elizabeth
the space age
a division of geological time, shorter than an epoch
a person's development in terms of the years required by an average individual for similar development
a mental age of six
informal (usu in pl) a long time
I have been waiting for you at least this age! — Jane Austen
have not seen you for ages
act one's age
to behave appropriately for one's age
come of age
to reach legal adult status
of an age
of a similar age
[Middle English via Old French from Latin aetat-, aetas, from aevum lifetime]