What does «incorrecto» mean in Spanish?

Not correct, with errors or defects.

Examples of use in Spanish: "Es incorrecta tu respuesta".
Not in accordance with moral standards or courtesy.

Examples of use in Spanish: "Su actitud es incorrecta, no puede tratar así a la gente".
Who is not dressed appropriately for the situation.

Examples of use in Spanish: "Lleva un traje incorrecto para la ocasión, esto es una gala formal".