a lack of communication between one generation and another, especially between young people and their parents, brought about by differences of tastes, values, outlook, etc.
the years separating one generation from the generation that precedes or follows it, esp when regarded as representing the difference in outlook and the lack of understanding between them
A broad difference in values and attitudes between one generation and another, especially between parents and their children. For example, There's a real generation gap in their choice of music, restaurants, clothing—you name it. [1960s”
