Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “whiten”


verb [I/T] (COLOR)   /ˈhwɑɪ·tən, ˈwɑɪ-/
to make something whiter , or to become whiter : [T] This toothpaste is supposed to whiten your teeth .
(Definition of whiten verb (COLOR) from the Cambridge Academic Content Dictionary © Cambridge University Press)
Focus on the pronunciation of whiten

Definitions of “whiten” in other dictionaries

Word of the Day


the skill or activity of preparing and cooking food

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More