›to call a person, esp. a baby, a Christian through the ceremony of baptism and by naming the person: The parents christened their second child Maria.›If a ship is christened, it is officially given its name: The First Lady christened the ship, “USS Arizona.”›If you christen something new, you use it for the first time: I’m going to christen my new golf clubs this week.christening
/ˈkrɪs·ə·nɪŋ/n[C]›We celebrated the christening of my boss’s new baby in grand style.