Simple Definition of brighten
: to add more light to (something)
: to make (something) more colorful or cheerful
: to become brighter or more cheerful
Examples of brighten
He brightened the picture on the television.
Flowers can brighten any room.
The good news brightened her mood.
The sky brightened after the storm.
Business prospects brightened last month.
Her face brightened in relief when she heard that he was not hurt.
First Known Use of brighten
Seen and Heard
What made you want to look up brighten? Please tell us where you read or heard it (including the quote, if possible).