LIGHTNESS, noun li'teness. 1. Want of weight; levity; the contrary to heaviness; as the lightness of air, compared with water. 2. Inconstancy; unsteadiness; the quality of mind which disposes it to be influenced by trifling considerations. - Such is the lightness of you common men. 3. Levity; wantonness; lewdness; unchastity. 4. Agility; nimbleness.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI