"To define a generation" means to have a significant impact on shaping the beliefs, attitudes, culture, and values of a particular group of people who were born and grew up around the same time. Full definition
It has defined a generation of gamers and changed how people view video games. (amazon.com)
So defining our generation with art was important and it was beautiful. (creativeboom.com)
While critics saw these many simultaneous categories of Abstraction as significant and distinct, it is difficult to narrowly define this generation of artistic exploration. (ashevilleart.org)