Definition: Counterlegislation is a legal doctrine in which legislation or laws are being passed by two or more different bodies of government, such as two or more branches of Congress. This could be for various reasons including disagreements over policy priorities, concerns about budgetary allocations, or differences on the interpretation of existing statutes. Counterlegislative action is typically characterized by a lack of consensus and can lead to legal challenges or even lawsuits if not resolved in a timely manner.