belief

noun

1. Mental acceptance of a claim as true.“It's my belief that the thief is somebody known to us.”
2. Faith or trust in the reality of something; often based upon one's own reasoning, trust in a claim, desire of actuality, and/or evidence considered.“Based on this data, it is our belief that X does not occur.”
3. Something believed.“The ancient people have a belief in many deities.”
4. The quality or state of believing.“My belief that it will rain tomorrow is strong.”