brightness
//ˈbraɪt.nəs//
Noun
brightnessSingular
brightnessesPlural
1
The quality or state of emitting or reflecting light; luminosity.
The brightness of the sun made it hard to see.
2
The quality of being vivid, intense, or brilliant in color.
The brightness of the autumn leaves was stunning.
3
Intelligence, cleverness, or mental sharpness.
The teacher was impressed by the brightness of her new student.
4
A feeling of cheerfulness, optimism, or hopefulness.
Her brightness and optimism lifted everyone's spirits.