Oxford Advanced American Dictionary

Definition of senator noun from the Oxford Advanced Learner's Dictionary

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senator

noun
senator pronunciation English ˈsenətə(r) senator pronunciation American ˈsenətər
(often Senator) (abbr. Sen.)
 
a member of a senate
Senator McCarthyShe has served as a Democratic senator for North Carolina since 2009.senatorial
senatorial pronunciation English ˌsenəˈtɔːriəl senatorial pronunciation American ˌsenəˈtɔːriəl
adjective [only before noun]a senatorial candidate