The definition of counterculture is a way of life, a set of attitudes or a group of people whose ideas and values are different than the mainstream accepted beliefs.
The hippie ideas, beliefs and values of the 1970's were an example of thecounterculture.
a culture, as that of many young people of the 1960s and 1970s, manifested by a lifestyle that is opposed to the prevailing culture
A culture, especially of young people, with values or lifestyles in opposition to those of the established culture.
From counter- + culture.