Baptist (noun)

1. A member of a Christian denomination that emphasizes the importance of baptism by immersion, typically as a rite of adult conversion, and that adheres to the belief in the authority of the Bible and the autonomy of individual congregations.
2. A person who performs the rite of baptism.

Origin:

From the greek word "baptizein" meaning to immerse or submerge.

Examples:

1. He is a baptist and attends a baptist church.
2. She is a baptist and believes in adult baptism.
3. He is a baptist minister and performs baptisms.
4. She is a baptist and follows the principles of the baptist church.
5. He is a baptist and follows the baptist doctrine.