1. the quality or state of having little weight
2. the quality or state of being bright or well-lit
3. the quality of being cheerful, carefree, or not serious

Examples

• The lightness of the foam made it easy to carry.
• She was surprised by the lightness of the package.
• The lightness of the room made it feel spacious and airy.
• His lightness of spirit was contagious at the party.
• The comedian’s lightness helped ease the tension in the room.
• The lightness of her hair color complemented her complexion.
• The fabric’s lightness made it perfect for summer clothing.