1. formed beforehand without adequate evidence or experience; predetermined
Usage: often used with ‘notion’, ‘idea’, or ‘opinion’

Examples

• She tried to approach the interview without any preconceived notions about the candidate.
• His preconceived ideas about the city were completely wrong.
• The judge warned the jury to set aside preconceived opinions.
• Don’t let preconceived beliefs cloud your judgment.
• The researcher avoided preconceived assumptions about the results.
• Many preconceived stereotypes were challenged by the study.
• He entered the discussion with a preconceived agenda.