all the people who were born at about the same time
the younger/older generation
My generation have grown up without the experience of a world war.
I often wonder what future generations will make of our efforts.
the average time in which children grow up, become adults and have children of their own (usually considered to be about 30 years)
a generation ago
My family have lived in this house for generations .
a single stage in the history of a family
stories passed down from generation to generation
第一 / 第二代美国人（家人在美国居住了一、二代者）
a first-/second-generation American (= a person whose family has lived in America for one/two generations)
a group of people of similar age involved in a particular activity
She has inspired a whole generation of fashion school graduates.
a stage in the development of a product, usually a technical one
a new generation of vehicle
the production of sth, especially electricity, heat, etc.
the generation of electricity
methods of income generation