1. (

• preconception ,
• prepossession ,
• parti_pris ,
• preconceived_opinion ,
• preconceived_idea ,
• preconceived_notion

) an opinion formed beforehand without adequate evidence; "he did not even try to confirm his preconceptions" ;

2. (

• bias ,
• prejudice ,
• preconception ,

) a partiality that prevents objective consideration of an issue or situation ;