1
: commercial iron that contains carbon in any amount up to about 1.7 percent as an essential alloying constituent, is malleable when under suitable conditions, and is distinguished from cast iron by its malleability and lower carbon content
2
: an instrument or implement of or characteristically of steel: such as
a
: a thrusting or cutting weapon
b
: an instrument (such as a fluted round rod with a handle) for sharpening knives
c
: a piece of steel for striking sparks from flint
3
: a quality (such as physical strength or hardness of mind or spirit) that suggests steel
had a grip like steel
nerves of steel
4
a
: the steel manufacturing industry
b
steels plural
: shares of stock in steel companies
steeled; steeling; steels
1
: to overlay, point, or edge with steel
2
a
: to cause to resemble steel (as in looks or hardness)
b
: to fill with resolution or determination
steeled herself to face the crisis
1
: made of steel
2
: of or relating to the production of steel
3
: resembling steel
Examples of steel in a Sentence
Noun
The beams are made of steel.
Steel is an important industry in this area.
The invaders were driven back by steel.
the steel of a knife
Verb
hoped that his inspirational talk would steel the youths in the pursuit of their dreams
years of running a farm had steeled the hard-bitten woman
Recent Examples on the Web
Rachel Cormack, Robb Report, 18 Dec. 2025
This involves a primary target chamber sealed by a high-speed closure valve, situated within a secondary steel vessel.
—Aman Tripathi, Interesting Engineering, 18 Dec. 2025
Sophie Caldwell, CNBC, 17 Dec. 2025
On the environment beat, look for further reporting on Kentucky's resilience in the face of flooding and other disasters, following a legislative task force report outlining recommendations for steeling the state against strengthening storms.
—Connor Giffin, Louisville Courier Journal, 15 Dec. 2025
Cnn.com Wire Service, Mercury News, 19 Aug. 2025
Around the country, mining operations have cropped up in an ex-steel mill in Calvert City, Kentucky; an ex-Gateway Computer industrial campus in South Dakota; a power plant in Hardin, Montana; a former airplane hangar in Big Spring, Texas; and old fruit warehouses in Eastern Washington State.
—Sophie Haigney, Curbed, 13 July 2021
See All Example Sentences for steel
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Noun
As with the regular production model, the Cento exudes the yard’s elegant design DNA, with a sporty character, sleek, flowing lines, the classic mahogany deck, and gleaming steel accents.
—Rachel Cormack, Robb Report, 18 Dec. 2025
This involves a primary target chamber sealed by a high-speed closure valve, situated within a secondary steel vessel.
—Aman Tripathi, Interesting Engineering, 18 Dec. 2025
Verb
As the end of the year approaches, many workers are steeling themselves for their annual performance review.
—Sophie Caldwell, CNBC, 17 Dec. 2025
On the environment beat, look for further reporting on Kentucky's resilience in the face of flooding and other disasters, following a legislative task force report outlining recommendations for steeling the state against strengthening storms.
—Connor Giffin, Louisville Courier Journal, 15 Dec. 2025
Adjective
The non-steel and non-aluminum components of the products face other applicable levies.
—Cnn.com Wire Service, Mercury News, 19 Aug. 2025
Around the country, mining operations have cropped up in an ex-steel mill in Calvert City, Kentucky; an ex-Gateway Computer industrial campus in South Dakota; a power plant in Hardin, Montana; a former airplane hangar in Big Spring, Texas; and old fruit warehouses in Eastern Washington State.
—Sophie Haigney, Curbed, 13 July 2021
See All Example Sentences for steel
Cite this Entry
“Steel.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/steel. Accessed 20 Dec. 2025.
Copy CitationKids Definition
steel
1 of 3 noun1
: commercial iron that contains carbon in any amount up to about 1.7 percent as a necessary part
2
: an article (as a sword) made of steel
3
: a hard cold quality
answered with steel in her voice
steel
2 of 3 verb
: to fill with courage or determination
steel
3 of 3 adjective1
: made of or like steel
2
: of or relating to the production of steel
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