A more thorough explanation:

Definition: An intern is an advanced student or recent graduate who is working to gain practical experience before entering a specific profession. They work under the supervision of professionals in their field to learn and develop their skills.

Example: John is a recent graduate with a degree in journalism. He is interning at a local newspaper to gain experience in the field and learn from experienced journalists.

Explanation: John is an intern because he is a recent graduate who is working to gain practical experience in his field before entering the workforce. He is working under the supervision of experienced journalists to learn and develop his skills as a journalist.

Another example of an intern could be a medical student who is interning at a hospital to gain practical experience before becoming a doctor.

Note: The term "intern" can also be used as a verb to describe the act of working in an internship.