Juvenile court, also known as young offender's court or children's court, is a tribunal having special authority to pass judgements for crimes committed by children who have not attained the age of majority. In most modern legal systems, children who commit a crime are treated differently from legal adults who have committed the same offense.

Juvenile delinquency, also known as juvenile offending, is the act of participating in unlawful behavior as a minor or individual younger than the statutory age of majority. These acts would otherwise be considered crimes if the individuals committing them were older. The term delinquent usually refers to juvenile delinquency, and is also generalised to refer to a young person who behaves an unacceptable way.