Moonlighting means working a second job in addition to your main job, usually at night or on weekends. The term comes from the idea of working by moonlight after your regular daytime work is done.

A teacher might moonlight as a weekend tutor to earn extra money. A firefighter might moonlight as a carpenter during their days off. An office worker could moonlight as a musician, playing weekend gigs at local venues. The second job is the moonlighting job, while their main career remains their primary focus.

People moonlight for different reasons. Some need the extra income to pay bills or save for something important. Others moonlight to pursue a passion or hobby that doesn't pay enough to be their main job yet. A programmer who dreams of becoming a chef might moonlight in a restaurant kitchen to learn the trade.

The word can carry a slightly secretive feeling because some employers don't want their workers moonlighting, worried it might affect their main job performance. But for many people, moonlighting is simply a practical way to make ends meet or explore their interests while keeping a stable career.