Baptize \Bap*tize"\, v. t. [imp. & p. p. {Baptized}; p. pr. & vb. n. {Baptizing}.] [F. baptiser, L. baptizare, fr.Gr. ?. See {Baptism}.] 1. To administer the sacrament of baptism to. 2. To christen ( because a name is given to infants at their baptism); to give a name to; to name. I'll be new baptized; Henceforth I never will be Romeo. --Shak. 3. To sanctify; to consecrate.