cast-iron

[ kast-ahy-ern, kahst- ]
/ ˈkæstˈaɪ ərn, ˈkɑst- /

adjective

made of cast iron.
not subject to change or exception: a cast-iron rule.
hardy: a cast-iron stomach.

Origin of cast-iron

First recorded in 1655–65

Definition for cast-iron (2 of 2)

cast iron

noun

an alloy of iron, carbon, and other elements, cast as a soft and strong, or as a hard and brittle, iron, depending on the mixture and methods of molding.

Origin of cast iron

1655–65; cast (past participle of cast) + iron

Example sentences from the Web for cast-iron

British Dictionary definitions for cast-iron

cast iron

noun

iron containing so much carbon (1.7 to 4.5 per cent) that it cannot be wrought and must be cast into shape

adjective cast-iron

made of cast iron
rigid, strong, or unyielding a cast-iron decision