WordNet sense 1 (a feeling of joy and pride):

elation, high spirits

WordNet sense 2 (the property of being comparatively small in weight):

weightlessness

WordNet sense 3 (the gracefulness of a person or animal that is quick and nimble):

agility, legerity, nimbleness, lightsomeness

WordNet sense 4 (the visual effect of illumination on objects or scenes as created in pictures):

light