misapprehension
noun /ˌmɪsæprɪˈhenʃn/
/ˌmɪsæprɪˈhenʃn/
[uncountable, countable] (formal)- a wrong idea about something, or something you believe to be true that is not true
- I was under the misapprehension that the course was for complete beginners.
- You seem to be under the misapprehension that I approve of the plan.