Reformed means: Corrected; amended; restored to purity or excellence; said, specifically, of the whole body of Protestant churches originating in the Reformation, or, in a more restricted sense, of those who. 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.