(1):
(n.) Fig.: Hardness; callousness; obduracy.
(2):
(n.) That which is petrified; popularly, a body incrusted with stony matter; an incrustation.
(3):
(n.) The process of petrifying, or changing into stone; conversion of any organic matter (animal or vegetable) into stone, or a substance of stony hardness.
(4):
(n.) The state or condition of being petrified.