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Entry 3 senses · 2 variants Webster, 1913

Lightness

· Light·ness · IPA /ˈlaɪtnəs/
01 n. The state, condition, or quality, of being light or not heavy; buoyancy; levity; fickleness; nimbleness; delicacy; grace.
  1. 1.
    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.
02 n. Illumination, or degree of illumination; as, the lightness of a room.
  1. 1.
    Illumination, or degree of illumination; as, the lightness of a room.
  2. 2.
    Absence of depth or of duskiness in color; as, the lightness of a tint; lightness of complexion.