Christen (verb)

1. To baptize in the Christian Church.
2. To give a name to (a person or thing) at baptism or at the naming ceremony.
3. To use a name or term for the first time; to coin or invent a name or term.

Origin:

From the old english cristnan, from the latin christiānus ("follower of christ"), from christus ("christ"). the verb form "christen" first appeared in the 14th century, originally meaning "to baptize in the name of christ".

Examples:

1. The baby was christened in the local church.
2. The parents had chosen the name Emma for the baby, who was to be christened on Sunday.
3. She was christened the ship before it set sail.
4. He christened the new product.
5. The phrase was first christened by him.