Simple Definition:

Christian is a term used to describe a person who believes in Jesus Christ and follows his teachings [the lessons or ideas that Jesus Christ taught].

For example:

• Sarah considers herself a Christian because she attends church regularly and tries to live her life according to the principles that Jesus Christ taught.
• John reads the Bible and prays every day because he wants to deepen his understanding of his Christian faith.

Very Simple Definition:

A Christian is someone who believes in and follows Jesus Christ.

For example:

• Emily is a Christian because she believes that Jesus Christ is her savior and tries to live her life in a way that shows her love for him.
• David goes to church and prays because he wants to show that he is a Christian and wants to be closer to Jesus.