- The definition of a preconception is a notion, opinion or idea that you have formed before going into something, sometimes based on bias or prejudice.
An example of a preconception is when you make up your mind in advance what someone is going to be like without knowing the person.
- the act of preconceiving
- a preconceived idea or opinion
Origin of preconceptionMedieval Latin preconceptio
An opinion or conception formed in advance of adequate knowledge or experience, especially a prejudice or bias.