Entry 1 sense Webster, 1913 Debater /dəb-āt'-ẽr/ · De·bat·er · IPA /dɪˈbeɪtə(ɹ)/ 01 n. One who debates; one given to argument; a disputant; a controvertist. 1. One who debates; one given to argument; a disputant; a controvertist. “Debate where leisure serves with dull debaters.” — Shak.