Gazette means: An official periodical publication published by a government containing legal and state notices, and in some cases, legislations, subsidiary legislations and bills.. It is legal vocabulary; usage is usually formal, institutional, or news-related rather than casual teen talk. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour. If your teen uses it, context will usually make the intent clear. A short, curious question about where they heard it is usually all that is needed to know whether to follow up.