Meaning of “cast iron” in the English Dictionary

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"cast iron" in English

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uk /ˌkɑːst ˈaɪən/ us /ˌkæst ˈaɪrn/

› a type of hard iron that will not bend easily and is made into shapes by being poured into a mould when melted

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uk /ˌkɑːstˈaɪən/ us /ˌkæstˈaɪrn/

cast-iron guarantee, alibi, etc.

› a guarantee, alibi, etc. that can be trusted completely:

Can you give me a cast-iron guarantee that the work will be completed on time?

He has a cast-iron stomach - he can eat anything.

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

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

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