Definition of cast-iron
- a cast-iron stomach
- a cast-iron will
- "Clever idea, Black, getting yourself seen on a safe station platform … gave you a cast-iron excuse not to leave your hidey-hole in future, didn't it?"
- —J. K. Rowling
The fence is made of cast iron.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cast iron.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
: made of cast iron
: very strong or tough
: not likely to fail or be broken
: a very hard type of metal that is made into different shapes by being melted and poured into special containers (called casts or molds)
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