Cheerful means having or showing a happy, positive mood that brightens the space around you. A cheerful person smiles easily, speaks with warmth, and makes others feel welcome. When you walk into class with a cheerful attitude, you're ready to tackle the day's challenges with optimism and energy.

The word describes an outward quality that affects others and the environment. Someone can feel happy watching their favorite show alone, but cheerful involves expressing that happiness in ways that lift the spirits of people around you. A cheerful greeting makes someone's morning better. A cheerful room, painted in bright colors with sunlight streaming through windows, lifts people's spirits when they enter.

Cheerfulness can show resilience: a cheerful person might feel disappointed when it rains during recess but quickly suggests an indoor game instead. They don't ignore problems but face them with hope and creativity. This makes cheerful people valuable friends and teammates because their positive energy helps groups push through difficulties.

You might describe a song as cheerful if it has an upbeat melody that makes you want to dance, or a story as cheerful if it leaves you feeling happy and optimistic. The opposite of cheerful would be gloomy, sullen, or dejected.