[ding.dong] n [imit.] (1611): the ringing sound produced by repeated strokes esp. on a bell
[2]dingdong vi (1659) 1: to make a dingdong sound
2: to repeat a sound or action tediously or insistently [3]dingdong adj (1792) 1: of, relating to, or resembling the ringing sound made by a bell
2: marked by a rapid exchange or alternation