A full-stack course is a comprehensive educational program that teaches individuals the skills needed to develop both the frontend and backend components of a web application. It covers a range of technologies, including HTML, CSS, JavaScript for the frontend, and databases, server-side scripting, and frameworks like Node.js or Django for the backend. By providing a holistic understanding of the entire web development process, a full-stack course equips learners with the ability to create end-to-end solutions and become proficient full-stack developers in the field of software development.