Meaning of “whiten” in the English Dictionary

american-english dictionary

(Definition of “whiten” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"whiten" in American English

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whitenverb [ I/T ]

us /ˈhwɑɪ·tən, ˈwɑɪ-/

whiten verb [ I/T ] (COLOR)

to make something whiter, or to become whiter:

[ T ] This toothpaste is supposed to whiten your teeth.

(Definition of “whiten” from the Cambridge Academic Content Dictionary © Cambridge University Press)