1. To cause to adopt a different faith.
2. To change from one system to another; SYN. change over.
3. To change in nature; esp. undergo a chemical change.
4. To change religious beliefs, or adopt a religious belief.
5. To change the nature of something.
6. To make (someone) agree, understand, or realize the truth or validity of something; SYN. win over, convince, turn.