Relating to or characteristic of the period of adolescence, typically describing behavior or attitudes that are typical of teenagers. His adolescent humor often made the adults roll their eyes.
Immature or juvenile in behavior or thought, often used to describe someone who is acting in a way that is not fully grown-up. Her adolescent approach to problem-solving was not suitable for the corporate environment.
In an early stage of development; not yet fully mature. The country's adolescent democracy was still taking shape.