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
Biden also hikes tariffs on Chinese electric vehicles, solar cells, steel, aluminum and medical equipment in May 2024.
—TIME, 8 Mar. 2025
Outside, aluminum siding that mirrors the changing sky cloaks a low-profile silhouette, nearly camouflaging the home in the surrounding greenery.
—Spencer Elliott, Forbes, 7 Mar. 2025
There will be even more tariffs to come, including on all imports of steel and aluminum, and a 25 percent tax on all imports from the EU.
—The Editors, National Review, 7 Mar. 2025
Argentina, Australia, Brazil, Canada, Japan, Mexico, South Korea, the European Union, Ukraine and the United Kingdom were exempt from the taxes on steel and aluminum imports during the first Trump administration.
—Ailia Zehra, The Hill, 7 Mar. 2025
See All Example Sentences for aluminum
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TIME, 8 Mar. 2025
Outside, aluminum siding that mirrors the changing sky cloaks a low-profile silhouette, nearly camouflaging the home in the surrounding greenery.
—Spencer Elliott, Forbes, 7 Mar. 2025
There will be even more tariffs to come, including on all imports of steel and aluminum, and a 25 percent tax on all imports from the EU.
—The Editors, National Review, 7 Mar. 2025
Argentina, Australia, Brazil, Canada, Japan, Mexico, South Korea, the European Union, Ukraine and the United Kingdom were exempt from the taxes on steel and aluminum imports during the first Trump administration.
—Ailia Zehra, The Hill, 7 Mar. 2025
See All Example Sentences for aluminum
Articles Related to aluminum
Cite this Entry
“Aluminum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/aluminum. Accessed 12 Mar. 2025.
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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