Intern/ɪnˈtɜːrn/ Definition 1 of 3Pro Tip 1/3Career Exploration Interning is often a way to explore career options and gain field experience. He became an intern to see if marketing was the right career for him. Pro Tip 2/3Workplace Setting Use 'intern' to describe someone working in a professional environment to learn. As an intern, she attended client meetings to learn the ropes. Pro Tip 3/3Time-limited Position An intern position is temporary and usually lasts for a specific period, like summer. He's a summer intern, assisting with the social media campaign.