light·ness /-nəs/
  輕,明亮
  Light·ness, n.  The state, condition, or quality, of being light or not heavy; buoyancy; levity; fickleness; nimbleness; delicacy; grace.
  Syn: -- Levity; volatility; instability; inconstancy; unsteadiness; giddiness; flightiness; airiness; gayety; liveliness; agility; nimbleness; sprightliness; briskness; swiftness; ease; facility.
  Light·ness, n.
  1. Illumination, or degree of illumination; as, the lightness of a room.
  2. Absence of depth or of duskiness in color; as, the lightness of a tint; lightness of complexion.
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  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]