Source : Webster's Revised Unabridged Dictionary (1913)

Chairman \Chair"man\, n.; pl. {Chairmen}.
   1. The presiding officer of a committee, or of a public or
      private meeting, or of any organized body.

   2. One whose business it is to cary a chair or sedan.

            Breaks watchmen's heads and chairmen's glasses.
                                                  --Prior.

Source : WordNet®

chairman
     n : the officer who presides at the meetings of an organization;
         "address your remarks to the chairperson" [syn: {president},
          {chairwoman}, {chair}, {chairperson}]

chairman
     v : act or preside as chair, as of an academic department in a
         university; "She chaired the department for many years"
         [syn: {chair}]