资料来源 : pyDict

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资料来源 : Webster's Revised Unabridged Dictionary (1913)

Lightness \Light"ness\, n. [From {Light} not heavy.]
   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.

Lightness \Light"ness\, n. [From {Light} bright.]
   1. Illumination, or degree of illumination; as, the lightness
      of a room. --Chaucer.

   2. Absence of depth or of duskiness in color; as, the
      lightness of a tint; lightness of complexion.

资料来源 : WordNet®

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}]