The Collaborative International Dictionary of English v.0.48:

questionnaire \ques`tion`naire"\, n.; pl. -naires (F. ?). [F.]
   1. same as Questionary.
      [Webster 1913 Suppl.]

   2. A list of questions, usually on a printed form, to be
      answered by an individual. The forms often have blank
      spaces in which the answers can be written. Sets of such
      forms are distributed to groups and the answers used for
      various purposes, such as to obtain statistical
      information for social science, political, or marketing
      research, or to obtain information about a patient for the
      use of medical practitioners.
      [PJC]