juvenile

"Juvenile" does not always refer to a young person. It often describes someone who has not reached legal adulthood, as in "juvenile delinquent," but it can also describe anything connected with youth. Think of "juvenile fiction," which is written for young readers, or "juvenile court," which deals with cases involving minors. It can also suggest that someone is not fully mature yet, either because of age or behavior.

The word comes from the Latin juvenis, meaning young. You might say that a joke, argument, or prank is "juvenile" if it seems childish or silly. So although the word often appears in legal settings, it more broadly points to things connected with youth or with immature behavior.

The word "juvenile" has two main uses. Most commonly, it describes someone who is young and not yet legally considered an adult, often someone under the age of 18. This is the meaning used in legal settings: "juvenile court," "juvenile detention center," or "juvenile offender." In these cases, the term shows that the person is treated differently from an adult because of their age and level of responsibility.

However, "juvenile" is not limited to people. In biology, it describes an organism that has not yet reached its adult form, such as a bird in its "juvenile plumage." It can also describe things related to youth in general. "Juvenile fiction," for example, is written for younger readers. On the other hand, you might describe an adult's behavior as "juvenile" if it seems childish, such as refusing to share, making rude jokes, or throwing a tantrum. In this sense, the word suggests immaturity rather than age.

Whether you are talking about the law, biology, books for children, or childish behavior, the key idea is the same: the word points to youth, early development, or a lack of maturity.

The word comes from the Latin juvenis, meaning young. Whether you are talking about legal responsibility, stages of growth, or the way someone behaves, "juvenile" points to something connected with youth, either literally or by comparison. It can sound neutral in legal or scientific contexts, but when used about behavior, it is often mildly negative.