Source : Webster's Revised Unabridged Dictionary (1913)

Questioner \Ques"tion*er\, n.
   One who asks questions; an inquirer. ``Little time for idle
   questioners.'' --Tennyson.

Source : WordNet®

questioner
     n : someone who asks a question [syn: {inquirer}, {enquirer}, {querier},
          {asker}]