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English definition of “controversial”

controversial

adjective  /ˌkɑn·trəˈvɜr·ʃəl, -ˈvɜr·si·əl/ us  
causing or likely to cause disagreement: a controversial theory/movie
controversially
adverb /ˌkɑn·trəˈvɜr·ʃə·li, -ˈvɜr·si·ə·li/
They are also very controversially talking about taxing Social Security benefits more than they are now.
(Definition of controversial from the Cambridge Academic Content Dictionary © Cambridge University Press)
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