1. the quality of being cheerful, carefree, or free from worry
Usage: somewhat formal or literary
2. the quality of being physically light or graceful in movement
Usage: literary

Examples

• The lightsomeness of her laughter filled the room with joy.
• His lightsomeness of spirit helped him through difficult times.
• The dancer moved with remarkable lightsomeness across the stage.
• There was a certain lightsomeness in her step as she walked through the garden.
• The lightsomeness of the music matched the festive mood of the celebration.
• Her natural lightsomeness made her popular among her classmates.