The position of a student or trainee who works in an organization, sometimes without pay, in order to gain work experience or satisfy requirements for a qualification.  Each internship is different. Some interns work part-time, while others work full-time. An internship can last a week or a year. There are internships for high school, undergraduate, and graduate students. There are paid internships, unpaid internships, internships that provide course credit, and internships that are virtual. While employment isn’t guaranteed at the end of an internship, many employers use internships to train and evaluate future employees.