Most means the greatest amount or number of something. If most students in your class prefer pizza over tacos, more than half of them like pizza better. If you eat most of your vegetables at dinner, you finish more than half of them, even if a few pieces remain on your plate.

The word helps us talk about majorities and large portions without being perfectly exact. When someone says “most people enjoy summer vacation,” they don't mean literally everyone, but they mean the great majority do. You might read that most mammals give birth to live young, which is true even though platypuses and echidnas lay eggs.

Most can also describe the highest degree of something. The most difficult problem on a math test is harder than all the others. The most talented musician in the orchestra plays with greater skill than anyone else there.

People sometimes confuse most with almost. “Most students finished” means the majority completed their work. “Almost all students finished” means nearly everyone did, but a few didn't. The difference matters: most describes quantity or degree, while almost means nearly or not quite.