1. (noun)elation, high spirits, lightness a feeling of joy and pride
2. (noun)lightness, weightlessness the property of being comparatively small in weight "the lightness of balsa wood"
3. (noun)agility, legerity, lightness, lightsomeness, nimbleness the gracefulness of a person or animal that is quick and nimble
4. (noun)lightness having a light color
5. (noun)light, lightness the visual effect of illumination on objects or scenes as created in pictures
"he could paint the lightest light and the darkest dark"
6. (noun)lightsomeness, lightness the trait of being lighthearted and frivolous