A more thorough explanation:

Definition: A lawgiver is a person who creates or interprets laws. This can include:

1. A legislator who creates an entire set of laws.
2. A judge who has the power to interpret laws.

Example: John Chipman Gray, in his book The Nature and Sources of the Law, quotes Bishop Hoadley who said, "Whoever has the authority to interpret any written or spoken laws is truly the lawgiver, not the person who first wrote or spoke them."

This means that the person who interprets the law has the power to decide how it should be applied, even if they did not create the law themselves. For example, a judge may interpret a law differently than how a legislator intended it to be interpreted, and their interpretation becomes the law for that particular case.