Adultism just like childism, ageism, are discrimination against a particular set or oppression of people based on the age group the victims belong to. It is an indirect and mental attacks, mapping out how they should behave, communicate, react, dress by the majority group with social power and privilege whom fall outside the victims age bracket.
Adultism according to a source could be explained as behaviors and attitudes based on the assumption that adults are better than young people, and entitled to act upon young people without their permission or agreement. This treatment is reinforced by social institutions , parents and organizational structures,who often abuse the power that adults have over their children.