Pronunciation: (līt'nis),[key] —n. 1. the state or quality of being light in weight: the amazing lightness of the new metal. 2. the quality of being agile, nimble, or graceful.
3. lack of pressure or burdensomeness.
4. lack of seriousness; levity in actions, thoughts, or speech: That kind of lightness seemed out of place. 5. gaiety of manner, speech, style, etc.; cheerfulness: His lightness was just what the party needed.
Pronunciation: (līt'nis),[key] —n. 1. the state or quality of being light or illuminated.
2. thin or pale coloration.
3. the relative degree to which an object reflects light, esp. light of complementary or nearly complementary colors.