a list of questions, usually printed, submitted for replies that can be analyzed for usable information: a questionnaire used in market research.

1895–1900; < French, equivalent to question(er) to question + -aire; see -ary Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
questionnaire (ˌkwɛstʃəˈnɛə, ˌkɛs-)
a set of questions on a form, submitted to a number of people in order to collect statistical information
[C20: from French, from questionner to ask questions]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1901, from Fr. questionnaire "list of questions," from questionner "to question," from M.Fr. (see question). Purists preferred native formation questionary (1540s).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

questionnaire ques·tion·naire (kwěs'chə-nâr')
A printed form containing a set of questions, especially one addressed to a statistically significant number of subjects as a way of gathering information for a survey.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
No one has yet devised the perfect questionnaire to diagnose what's commonly
  known as narcissism.
All candidates will be asked to complete a questionnaire as part of the
  application process.
All were asked to complete an online questionnaire normally used to help
  couples understand their strengths and weaknesses.
Give each student a questionnaire to be completed by his or her family.
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