[countable, uncountable] misconception (about something) a belief or an idea that is not based on correct information, or that is not understood by people frequently held misconceptions about the disease a popular misconception (= one that a lot of people have) Let me deal with some common misconceptions. views based on misconception and prejudice compare preconceptionExtra examples We hope the documentary will dispel certain misconceptions about the disease. popular misconceptions about AIDS A popular misconception is that immigration is bad for the economy. I get annoyed by people’s misconceptions about older employees. It’s a common misconception that people who live together have the same rights as a married couple. It’s a widespread misconception that only women get breast cancer. Their views are based on misconception and prejudice.