The term LEARN COMPLETELY can be summarized as mastering a skill or knowledge. This means to gain a thorough understanding of a subject or task and to be able to apply it in a proficient manner. It is often used in the context of education, where students are expected to learn and understand the material completely in order to pass tests and exams. It can also be used in the workplace, where employees must MASTER certain skills in order to perform their job duties effectively.