Simple Definition of whiten
: to make (something) white or whiter or to become white or whiter
Examples of whiten
His hair whitened as he aged.
Bleach will whiten the linens.
The new toothpaste whitens teeth.
First Known Use of whiten
Seen and Heard
What made you want to look up whiten? Please tell us where you read or heard it (including the quote, if possible).