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
Sophia Beams, Better Homes & Gardens, 27 Feb. 2025
Heat oil in a large cast-iron skillet over medium-high heat.
—Jessica Fields, Essence, 21 Feb. 2025
Lauryn Jiles, Miami Herald, 3 Mar. 2025
Conner then showed them how to cook the cakes on the cast iron flat stove.
—Simon Perry, People.com, 26 Feb. 2025
See All Example Sentences for cast-iron
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Adjective
The collection doesn't stop at cast-iron products—the Wooden Magnetic Trivet 4-Piece Set will also be available upon the release of Gourmand, retailing for $100.
—Sophia Beams, Better Homes & Gardens, 27 Feb. 2025
Heat oil in a large cast-iron skillet over medium-high heat.
—Jessica Fields, Essence, 21 Feb. 2025
Noun
Made of heavy duty cast iron material, this versatile pot cooks food evenly and is compatible with most cook tops.
—Lauryn Jiles, Miami Herald, 3 Mar. 2025
Conner then showed them how to cook the cakes on the cast iron flat stove.
—Simon Perry, People.com, 26 Feb. 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 13 Mar. 2025.
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