aluminum
noun
alu·mi·num
ə-ˈlü-mə-nəm 
: a silver-white metallic chemical element with atomic number 13 that has good electrical and thermal conductivity, high reflectivity, and resistance to oxidation
—often used before another noun
aluminum foil
The sweet spot, the point in a bat where vibration supposedly is least, is said to be two times larger on an aluminum bat than on a wood one.—
Hank Hersch
Hank HerschBefore he evacuated, Mr. Gonzales tied the boat down with four gigantic ropes and all the storm could do was knock it off the construction blocks. He slowly climbs a battered aluminum ladder propped up on the port side.—Ken Wells
see Chemical Elements Table
Ken WellsExamples of aluminum in a Sentence
Recent Examples on the Web
And Still Rising Other aluminum producers, including Australia’s South32 and Norway’s Norsk Hydro have also been rising with the price of the metal which is up 15% since the war started in late February and up 47% since this time last year.
—Tim Treadgold, Forbes.com, 26 May 2026
That uses the aerodisc wheels, each machined from a single piece of aluminum and designed to minimize range-sapping eddies and wakes by funneling the air like a turbine.
—Jonathan M. Gitlin, ArsTechnica, 26 May 2026
Train contractors recently completed a partial fleet replacement, shifting from older steel cars to 26 aerodynamic white cars made of recycled aluminum.
—Bruce Finley, Denver Post, 26 May 2026
That was considered phase two of the debut, with the initial phase having occurred in Maranello this past October as part of Ferrari’s Capital Markets Day, which included the unveiling of the aluminum chassis and select elements of the power train.
—Viju Mathew, Robb Report, 25 May 2026
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Tim Treadgold, Forbes.com, 26 May 2026
That uses the aerodisc wheels, each machined from a single piece of aluminum and designed to minimize range-sapping eddies and wakes by funneling the air like a turbine.
—Jonathan M. Gitlin, ArsTechnica, 26 May 2026
Train contractors recently completed a partial fleet replacement, shifting from older steel cars to 26 aerodynamic white cars made of recycled aluminum.
—Bruce Finley, Denver Post, 26 May 2026
That was considered phase two of the debut, with the initial phase having occurred in Maranello this past October as part of Ferrari’s Capital Markets Day, which included the unveiling of the aluminum chassis and select elements of the power train.
—Viju Mathew, Robb Report, 25 May 2026
See All Example Sentences for aluminum
Cite this Entry
“Aluminum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/aluminum. Accessed 29 May. 2026.
Copy CitationKids Definition
aluminum
noun
alu·mi·num
ə-ˈlü-mə-nəm
: a silver-white malleable light element that conducts electricity and heat well, is highly resistant to oxidation, and is the most abundant metal in the earth's crust see element
Medical Definition
aluminum
noun
alu·mi·num
ə-ˈlü-mə-nəm
: a silver-white malleable ductile light trivalent metallic chemical element with atomic number 13 that has good electrical and thermal conductivity, high reflectivity, and resistance to oxidation
—symbol Al
see Chemical Elements Table
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