- (uncountable) the condition of being illuminated
- (uncountable) the relative whiteness or transparency of a colour
- (countable) The product of being illuminated.
- The state of having little weight, or little force.
- Agility of movement.
- Freedom from worry.
- Levity, frivolity; inconsistency.
- 1624, Democritus Junior [pseudonym; Robert Burton], The Anatomy of Melancholy: […], 2nd edition, Oxford, Oxfordshire: Printed by John Lichfield and James Short, for Henry Cripps, OCLC 54573970 ↗:, New York 2001, p.75:
- Seneca […] accounts it a filthy lightness in men, every day to lay new foundations of their life, but who doth otherwise?
- French: légèreté
- Russian: лёгкость
- Spanish: liviandad