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
The mix of steel and aluminum results in an ebike with clean lines and curvy edges, something the company hopes will not draw so many Cybertruck parallels in this political climate.
—Julian Chokkattu, Wired News, 12 June 2025
Early this month, Trump doubled tariffs on all steel and aluminum imports to 50%.
—Paul Davidson, USA Today, 12 June 2025
Trump recently announced a dramatic increase in tariffs on steel and aluminum imports, raising duties to 50 percent.
—Barney Henderson, MSNBC Newsweek, 11 June 2025
Federal lumber and aluminum tariffs will raise construction and basic appliance costs for homes.
—Saad Asad, San Diego Union-Tribune, 10 June 2025
See All Example Sentences for aluminum
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Julian Chokkattu, Wired News, 12 June 2025
Early this month, Trump doubled tariffs on all steel and aluminum imports to 50%.
—Paul Davidson, USA Today, 12 June 2025
Trump recently announced a dramatic increase in tariffs on steel and aluminum imports, raising duties to 50 percent.
—Barney Henderson, MSNBC Newsweek, 11 June 2025
Federal lumber and aluminum tariffs will raise construction and basic appliance costs for homes.
—Saad Asad, San Diego Union-Tribune, 10 June 2025
See All Example Sentences for aluminum
Cite this Entry
“Aluminum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/aluminum. Accessed 18 Jun. 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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