Major means large, significant, or important. A major problem is serious and needs attention, like a burst pipe flooding your basement rather than a dripping faucet. A major victory changes everything, like winning the championship instead of just one regular game. When doctors perform major surgery, they're doing something complex and risky that requires careful planning.

The word helps us distinguish what truly matters from what's minor or trivial. A major decision, like choosing which high school to attend, deserves serious thought. A major difference between two things is one you can't ignore. When a news story becomes major news, it affects many people or changes how we understand something important.

In music, major describes a bright, cheerful-sounding scale or chord, as opposed to minor, which sounds sadder or more serious. A song in a major key often feels happy or triumphant.

At universities, your major is the main subject you study most deeply, like biology or history. This usage connects to the idea of something being your primary focus.

The word can also mean a military rank (a Major in the Army) or refer to the major leagues in professional sports, where the best players compete.