B1
a set of questions asked of a large number of people to discover information about a subject
Dictionary examples:
The questionnaire asked, 'Do you like pizza?' Everyone answered 'Yes!' immediately. (0.0)
The questionnaire asked, 'Do you like filling out questionnaires?' I left it blank. (0.0)
The questionnaire asked, 'Are you honest?' I lied and said 'Yes'. (0.0)
Residents have been sent questionnaires about their homes and energy use. (35.8)