Branch of ethics that seeks to understand the nature of ethical properties, evaluations, statements, attitudes, and judgments;one of the four branches of ethics; questions: "What is goodness?", "How can we tell what is good from what is bad?"
In metaphilosophy and ethics, meta-ethics is the study of the nature, scope, and meaning of moral judgment. It is one of the three branches of ethics generally studied by philosophers, the others being normative ethics (questions of how one ought to be and act) and applied ethics (practical questions of right behavior in given, usually contentious, situations). Wikipedia