\ ˈkast-ˈī(-ə)rn How to pronounce cast-iron (audio) \

Definition of cast-iron

 (Entry 1 of 2)

1 : made of cast iron
2 : resembling cast iron: such as
a : capable of withstanding great strain a cast-iron stomach
b : not admitting change, adaptation, or exception : rigid a cast-iron will
c British : not likely to fail or be broken : airtight "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

cast iron


Definition of cast iron (Entry 2 of 2)

: a commercial alloy of iron, carbon, and silicon that is cast in a mold and is hard, brittle, nonmalleable, and incapable of being hammer-welded but more easily fusible than steel

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Synonyms & Antonyms for cast-iron

Synonyms: Adjective

Antonyms: Adjective

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Examples of cast-iron in a Sentence

Noun The fence is made of cast iron.
Recent Examples on the Web: Noun Extremely durable, cast iron provides excellent heat retention and is inexpensive. Marni Jameson,, "Equip your kitchen ― Part 1: Think you’re a bad cook? It could be your pans.," 16 Oct. 2020 This approach with two heavy skillets (cast iron is particularly good) is to create a panini-press effect. Star Tribune, "Sunday Supper: Apple and Mustard Grilled Cheese Sandwiches," 16 Oct. 2020 Savvy shoppers could have found a number of cast iron enameled Dutch ovens and skillets from the brand on sale earlier this week, but latecomers can still order this sauteuse oven for 40 percent off. Christie Calucchia, Southern Living, "Le Creuset’s Sauteuse Oven Is Still 40% Off After Amazon Prime Day," 15 Oct. 2020 Extremely durable, cast iron provides excellent heat retention and is inexpensive. Marni Jameson | Contributing Writer,, "Think you're a bad cook? Maybe it's your pots and pans. Here's how to equip your kitchen," 13 Oct. 2020 For the home chef: Lodge Cast Iron Skillet Anyone who's getting into cooking lately will surely appreciate a cast iron skillet. Kate Tully Ellsworth, USA TODAY, "50 great gifts under $25 people will actually use," 8 Oct. 2020 Missing cast iron features originally designed by architect Absalom Hallock for the building commissioned by the Phoenix Iron Works of San Francisco were replaced with identical pieces carved in wood and then recast in iron. oregonlive, "Historic preservation awards salute a wine-filled grain elevator, updated factories and other cool restorations (before, after photos)," 24 Sep. 2020 The pan feels incredibly durable, similar to the standard cast iron that can withstand years of use and wear (but only time can tell here — Our Place has only been around since 2019). Kate Bratskeir, CNN Underscored, "We tried the Instagrammable pan that claims to replace 8 kitchen tools," 24 Sep. 2020 Ringing in at a fraction of the cost of our best overall pick, the Staub cast iron 5.5-quart round cocotte (on sale for $235.85 in black, normally $464), we were thrilled by Lodge's outstanding output. Melissa Lee, USA TODAY, "Our favorite affordable Dutch oven brand just discounted its popular 6-quart model," 12 Sep. 2020

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.

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First Known Use of cast-iron


1692, in the meaning defined at sense 1


1664, in the meaning defined above

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Time Traveler for cast-iron

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The first known use of cast-iron was in 1664

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Cite this Entry

“Cast-iron.” Dictionary, Merriam-Webster, Accessed 31 Oct. 2020.

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How to pronounce cast iron (audio)

English Language Learners Definition of cast-iron

 (Entry 1 of 2)

: made of cast iron
: very strong or tough
British : not likely to fail or be broken

cast iron


English Language Learners Definition of cast iron (Entry 2 of 2)

: a very hard type of metal that is made into different shapes by being melted and poured into special containers (called casts or molds)

cast iron


Kids Definition of cast iron

: a hard and brittle alloy of iron, carbon, and silicon shaped by being poured into a mold while melted

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