Definition.com
Adolescence begins when children stop asking questions because they know all the answers.
Definition.com
Adolescence is the time in life when a youngster is well informed about anything he doesn't have to study.
Definition.com
Adolescence is represented by strong pressures toward introversion on the one hand, and rigid conformity to group action on the other.
Definition.com
Adolescence is a group nowadays who, because they can do drugs, have sex, make babies, and get money, take adulthood to be synonymous with responsibility rather than liberty, thus making it little surprise that they remain adolescents.