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
J. K. Rowling
: 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
Examples of cast-iron in a Sentence
Adjective
lost weight only after a cast-iron adherence to his diet
he has a cast-iron faith in his innate ability to overcome any adversity that life might throw against him
Noun
The fence is made of cast iron.
Recent Examples on the Web
Jenn Harris, Los Angeles Times, 17 Apr. 2025
Add chicken and toss until evenly coated, pressing to adhere.
Heat 2 tablespoons of the oil in a 12-inch cast-iron skillet over medium until shimmering.
—Kimberly Holland, Southern Living, 29 Apr. 2025
Nora Colomer
May Earn A Commission If You Buy Through Our Referral Links. This Content Was Created By A Team That Works Independently From The Fox Newsroom., FOXNews.com, 28 Apr. 2025
It is used for roasting, sauteing, barbecuing and thickening stews, but also to season cast iron and as a traditional ingredient in soap and candles.
—Scott Lafee, San Diego Union-Tribune, 22 Apr. 2025
See All Example Sentences for cast-iron
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Adjective
All recipes are written for a home oven with a pizza steel, though pizza stones, sheet pans or an upside-down cast-iron pan also could do the trick.
—Jenn Harris, Los Angeles Times, 17 Apr. 2025
Add chicken and toss until evenly coated, pressing to adhere.
Heat 2 tablespoons of the oil in a 12-inch cast-iron skillet over medium until shimmering.
—Kimberly Holland, Southern Living, 29 Apr. 2025
Noun
This cast iron option gets a lot of great reviews from happy customers.
—Nora Colomer
May Earn A Commission If You Buy Through Our Referral Links. This Content Was Created By A Team That Works Independently From The Fox Newsroom., FOXNews.com, 28 Apr. 2025
It is used for roasting, sauteing, barbecuing and thickening stews, but also to season cast iron and as a traditional ingredient in soap and candles.
—Scott Lafee, San Diego Union-Tribune, 22 Apr. 2025
See All Example Sentences for cast-iron
Cite this Entry
“Cast-iron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cast-iron. Accessed 7 May. 2025.
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