(1):

(v. i.) To become stone, or of a stony hardness, as organic matter by calcareous deposits.

(2):

(v. i.) Fig.: To become stony, callous, or obdurate.

(3):

(v. t.) To make callous or obdurate; to stupefy; to paralyze; to transform; as by petrifaction; as, to petrify the heart. Young.

(4):

(v. t.) To convert, as any animal or vegetable matter, into stone or stony substance.