Primarily used in the compound 先入観 (せんにゅうかん), meaning a preconceived idea or bias. Rarely used as a standalone noun.
Please listen without preconceptions.
His opinion is based on prejudice.
preconception; prejudice; bias
preconception; prejudice
preconception; prejudice; preoccupation
Compound of 先 (before, previous) and 入 (enter, put in), literally 'put in beforehand'. The exact historical derivation is uncertain, but the meaning of a preconceived idea is well established.