What is the meaning of Baptisen?

To baptise, christen (perform a baptism).

To receive a baptism.

To purify or consecrate.

To give a name, christen.

baptīsen, -īzen, v.”, in MED Online, Ann Arbor, Mich.: University of Michigan, 2007, retrieved 28 April 2018.

Nöjd, Ruben (1919), “Stressed Vowels and Diphthongs”, in The vocalism of Romanic words in Chaucer, Part II, Uppsala: Appelbergs Boktryckeri Aktiebolag, →OCLC, page 86.

Source: wiktionary.org