This document provides an overview of ethics by defining key terms and concepts. It discusses ethics as a major branch of philosophy encompassing right conduct and the good life. Personal ethics refers to moral codes for individuals, while social ethics means moral theory applied to groups. Ethics and morals respectively denote theory and practice. Meta-ethics examines the meaning and justification of ethical theories and judgments. Descriptive ethics takes a value-free approach by observing actual moral choices. Applied ethics aims to apply ethical theory to real-life situations like abortion and euthanasia. The document also outlines ethical dilemmas and different theoretical approaches in ethics.