Meaning: Formed before having the evidence for its truth or validity.

Part of speech: adjective

Example: He had preconceived notions about the topic before the discussion.

Category: Thought

Synonyms:

• prejudged
• biased

Antonyms:

• open-minded
• unbiased

Meaning: An idea or opinion formed before having the evidence for its truth.

Part of speech: noun

Example: Her preconception about the movie changed after she watched it.

Category: Thought

Synonyms:

• bias
• prejudice

Antonyms:

• open-mindedness
• objectivity