lightness

definition: the trait of being lighthearted and frivolous
example:
speech part: noun
synonyms: lightsomeness
definition: the visual effect of illumination on objects or scenes as created in pictures
example:
speech part: noun
synonyms: light
definition: having a light color
example:
speech part: noun
synonyms:
definition: the gracefulness of a person or animal that is quick and nimble
example:
speech part: noun
synonyms: lightsomeness
definition: the property of being comparatively small in weight
example: the lightness of balsa wood
speech part: noun
synonyms: weightlessness
definition: a feeling of joy and pride
example:
speech part: noun
synonyms: elation high spirits

How lightness is being used?