brightness
nounUK /ˈbraɪt.nəs/
US /ˈbraɪt.nəs/
Brightness is how much light something gives off or has.
The brightness of the sun made me squint.
SYNONYMS
OTHER MEANINGS
2. How smart or clever someone is.
Her brightness impressed all her teachers.
3. The strength or vividness of a color.
The brightness of the red paint made the room feel cheerful.
4. A happy or cheerful quality in someone's face or mood.
The brightness of his smile cheered everyone up.