bap ‧ tize BrE AmE ( also baptise British English ) /bæpˈtaɪz $ ˈbæptaɪz/ verb [transitive]
[ Date: 1200-1300 ; Language: Old French ; Origin: baptiser , from Late Latin , from Greek baptizein 'to dip, baptize' , from baptein 'to dip' ]
1 . to perform the ceremony of baptism on someone ⇨ christen
2 . to accept someone as a member of a particular Christian church by a ceremony of baptism:
He was baptized a Roman Catholic.
3 . to give a child a name in a baptism ceremony:
She was baptized Jane.