Meaning

noun a feeling of joy and pride

noun the property of being comparatively small in weight

noun the gracefulness of a person or animal that is quick and nimble

originFrom Middle English lightnes, lightnesse, from Old English *lēohtnes (“lightness”) (compare Old English lēohtmōdnes (“lightness”, literally “light-moodedness”), līhtingnes (“lightness, alleviation”)); equivalent to light (“not heavy”, adjective) + -ness (suffix forming nouns). Cognate with Middle Low German luchtnisse, lüchtnisse (“lightness, frivolity, joyfulness”).

Etymology from Wiktionary, CC BY-SA 3.0