Definition of “darken” - English Dictionary

“darken” in British English

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darkenverb [ I ]

uk /ˈdɑː.kən/ us /ˈdɑːr.kən/

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

“darken” in American English

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darkenverb [ I/T ]

us /ˈdɑr·kən/

to become or make something dark:

[ I ] The sky darkened as thick smoke billowed from the refinery.
[ T ] She pulled down the shades to darken the room.

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