1. the quality or state of being light in weight; lack of heaviness
Usage: plural of lightness
2. the quality or state of being bright or well-illuminated
Usage: plural of lightness
3. the quality of being cheerful, carefree, or not serious
Usage: plural of lightness

Examples

• The lightnesses of different materials were compared in the physics experiment.
• Various lightnesses of the room changed throughout the day as the sun moved.
• The children’s lightnesses of spirit made the party enjoyable for everyone.
• The artist mixed paints to achieve different lightnesses in her portrait.
• Different fabric lightnesses affected how the curtains hung.
• The photographer adjusted the camera settings to capture the lightnesses in the landscape.