A repeal's the removal or reversal of a law. This's generally done when a law's no longer effective, or it's shown that a law's having far more negative consequences than were originally envisioned. If a campaign for the repeal of a particular law gains particular moment, an advocate of the repeal might become known as a "repealer". This happened in 19th century Britain to a group in favour of the re-separation of Ireland from the United Kingdom Many repeals are the result of changes in society,… (More on Repeal)