Inappropriate means not suitable or not right for a particular situation, place, or audience. When something is inappropriate, it doesn't fit the context or breaks the expected rules of behavior.

Wearing pajamas might be perfectly appropriate at home but inappropriate for a formal wedding. Telling loud jokes is appropriate at recess but inappropriate during a school assembly. A movie rated for adults would be inappropriate for young children because of its content.

The word often signals that something violates social expectations or rules. An inappropriate comment might embarrass someone or hurt their feelings. An inappropriate outfit for cold weather, like shorts in a snowstorm, shows poor judgment about the situation.

Notice that what counts as inappropriate changes with context. Shouting enthusiastically is appropriate at a football game but inappropriate in a library. Running full speed works great in gym class but is inappropriate in a crowded hallway where someone could get hurt.

When adults say something is inappropriate, they usually mean it crosses a line: it's disrespectful, unsafe, or doesn't match the standards of that setting. Learning to recognize what's appropriate in different situations is an important skill. The opposite is appropriate, meaning fitting and proper for the circumstances.