/ ˈsenətə(r); NAmE / noun
(often Senator ) ( abbr. Sen. ) a member of a senate :
Senator McCarthy
He has served as a Democratic senator for Texas since 2000.
► sen·at·or·ial / ˌsenəˈtɔːriəl; NAmE / adjective [ only before noun ]:
a senatorial candidate
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WORD ORIGIN
Middle English (denoting a member of the ancient Roman senate): from Old French senateur , from Latin senator , from senex old man.