Definition and meaning of unconstitutional: A law, policy, or action is unconstitutional when it violates the Constitution of the United States of America. This means that it is not in line with the fundamental principles of our country that are stated in the Constitution, and thus, it is illegal and not allowed. Unconstitutional acts are often a result of politicians attempting to push their own agenda at the expense of the rights of citizens. Unconstitutionality has been used to restrict voting rights, limit access to healthcare, and even override the will of the people in states like North Carolina. These are just some examples of how unconstitutional acts can restrict the rights of individuals, and how they can be used to advance certain agendas.