preconception
noun [ C ] uk/ˌpriː.kənˈsep.ʃən/ us/ˌpriː.kənˈsep.ʃən/
事先构成的想法，先入之见，成见
an idea or opinion formed before enough information is available to form it correctly
Try to go into the meeting without too many preconceptions about what the other group wants. 与会前尽量不要对另一方的想法抱太多先入之见。