Meaning of “cast iron” in the English Dictionary

(Definition of “cast iron” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"cast iron" in American English

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cast ironnoun [ U ]

/ˈkæst ˈɑɪ·ərn/

a type of iron that is made into shapes by being poured into containers when melted:

a cast-iron frying pan

(Definition of “cast iron” from the Cambridge Academic Content Dictionary © Cambridge University Press)