lightness
     n 1: the property of being comparatively small in weight; "the
          lightness of balsa wood" [syn: {weightlessness}] [ant: {heaviness}]
     2: the gracefulness of a person or animal that is quick and
        nimble [syn: {agility}, {legerity}, {lightsomeness}, {nimbleness}]
     3: having a light color [ant: {darkness}]
     4: the visual effect of illumination on objects or scenes as
        created in pictures; "he could paint the lightest light
        and the darkest dark" [syn: {light}]
Source: WordNet® 2.0