Adolescence /ˌæd

generation /ˌdʒen.əˈreɪ.ʃ ə n/ noun AGE GROUP
1. [ C + singular or plural verb ] all the people of about the same age within a society or within a particular family
The younger generation smoke/smokes less than their parents did.
There were at least three generations - grandparents, parents and children - at the wedding.
It's our duty to preserve the planet for future generations.
This painting has been in the family for generations.
2. [ C + singular or plural verb ] a period of about 23 to 30 years, in which most human babies become adults and have their own children
A generation ago, home computers were virtually unknown.
3. first/second/third, etc. generation
describes the nationality of someone belonging to the first/second/third, etc. group of people of the same age in the family to have been born in that country
She's a second generation American (= her parents were American, although their parents were not) .