Entry 2 senses Webster, 1913 Senator /sĕn'-ət-ẽr/ · Sen·a·tor · IPA /ˈsɛn.ə.tɚ/ 01 n. A member of a senate. 1. A member of a senate. “The duke and senators of Venice greet you.” — Shak. 2. A member of the king's council; a king's councilor.(O.Eng.Law)