![](http://upload.wikimedia.org/wikipedia/commons/thumb/9/99/Wiktionary-logo-en-v2.svg/40px-Wiktionary-logo-en-v2.svg.png)
Look up lightness in Wiktionary, the free dictionary.
Lightness may refer to:
- Lightness, a property of a color
- Lightness (philosophy), a philosophical concept most closely associated with continental philosophy and existentialism, which is used in ontology
- A relatively low weight, mass or density of an object or material