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English definition of “broaden”

broaden

verb uk   /ˈbrɔː.dən/ us    /ˈbrɑː-/

broaden verb (WIDER)

[I or T] to become wider, or to cause something to become wider: The track broadens and becomes a road at this point. They are broadening the bridge to speed up the flow of traffic.Enlarging and inflatingBecoming bigger

broaden verb (MORE GENERAL)

C1 [T] to increase the range of something: They've introduced all sorts of new elements to that programme in order to broaden its appeal. I hoped that going to university might broaden my horizons (= increase the range of my knowledge and experience).Elaborating, specifying and simplifying
Phrasal verbs
(Definition of broaden from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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