Definition of "senator"

senator

/ˈsɛn.ə.tə/

noun
plural senators
1. A member, normally elected, in the house or chamber of a legislature called a senate, as, for instance, the legislatures of the United States and Canada.
  Quotations
  It was disbanded when Derrick was only six, after that grouchy old ultra-Libertarian Senator Timothy de Illy made “welfare hotel for Third-World nations” a household catchphrase.
  2003, Olga Gardner Galvin, The Alphabet Challenge, Page 31
  I was a United States senator-elect at age thirty.
  2007, Joe Biden, Promises to Keep‎, New York: Random House, published 2008, page 78
2. (dated) A member of any legislative body or parliament, particularly the British Parliament.
3. (historical) A member of the ancient Roman Senate.
4. (historical) A member of a governing council in other states in the ancient world.
5. A member of the ruler’s council or governing council in general, a leading statesman.
  Quotations
  Both we will raigne as Conſuls of the earth,And mightie kings ſhall be our Senators.
  c. 1587–1588, [Christopher Marlowe], Tamburlaine the Great. […] The First Part […], 2nd edition, part 1, London: […] [R. Robinson for] Richard Iones, […], published 1592; reprinted as Tamburlaine the Great (A Scolar Press Facsimile), Menston, Yorkshire, London: Scolar Press, 1973, (please specify the page)
6. (obsolete) An important church official.