Betterment is the act of making something better than it was before, or the improvement itself. When a city works on the betterment of its parks, it might add new playgrounds, plant more trees, or repair broken benches. When you focus on your own betterment, you're trying to improve yourself: maybe reading more books, practicing a musical instrument, or learning to be more patient with your little brother.

The word carries a sense of deliberate effort and purpose. A garden doesn't undergo betterment by itself: someone has to weed it, water it, and nurture it. Your math skills don't improve by accident: you achieve betterment through practice and study.

People also use this word when talking about improving society or communities. A scientist might dedicate her career to the betterment of human health by developing new medicines. A teacher works toward the betterment of her students by helping them learn and grow.