preconceived idea

Noun

1.

preconceived idea - an opinion formed beforehand without adequate evidence; "he did not even try to confirm his preconceptions" Synonyms: parti pris, preconceived notion, preconceived opinion, preconception, prepossession

opinion, parti pris, persuasion, preconceived notion, preconceived opinion, preconception, prepossession, sentiment, thought, view