noun, often attributive
alu·​mi·​num | \ ə-ˈlü-mə-nəm How to pronounce aluminum (audio) \

Definition of aluminum

: 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 foilThe 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 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

Examples of aluminum in a Sentence

Recent Examples on the Web

In the early 1900s, workers cemented boundary monuments made of aluminum-bronze and standing 2.5-feet tall along much of the border’s length. Anchorage Daily News, "The thin line between Alaska and Canada," 13 July 2019 Its machined aluminum is angularly styled at nearly every corner, which will certainly elicit some sort of reaction out of bystanders. Cameron Faulkner, The Verge, "Acer Predator Triton 900 review: weird flex," 12 July 2019 The 1950s building, outfitted with shiny new cylindrical aluminum exterior lights, brings out the mid-century appeal of the gas station, its Bauhaus and Art Deco lineage cueing up a curiously Modernist nostalgia. Rand Richards Cooper,, "Review: M/BAR in Mystic turns out premium eats and brims with brashness and flair," 12 July 2019 Today the Command Module of Apollo 11 is a relic from another age, 11,700 pounds of aluminum alloy, stainless steel and titanium, built in Downey, Calif., by North American Rockwell. David Shribman,, "50 years after Apollo 11, the moon’s allure still resonates," 11 July 2019 Behind a steel fence, a mountain of aluminum debris sat near the potrooms. Mark Dent, WIRED, "The Hard-Luck Texas Town That Bet on Bitcoin—and Lost," 11 July 2019 That display is still encased in an aluminum housing that comes in gold, silver and space gray and features a headphone jack and two USB-C Thunderbolt ports. Jacob Krol, CNN Underscored, "Apple's MacBook Air is now an even better value at just $1,099," 11 July 2019 The company has been manufacturing aluminum cookware vessels in Manitowoc since 2005. Houston Chronicle, "Sugar Land-based Tramontina closes Wisconsin plant; 145 jobs eliminated," 9 July 2019 Elk Creek Marina: Choose from large and midsized pontoons, aluminum fishing boats, single or tandem kayaks, canoes and standup paddleboards at Elk Creek Marina (and the nearby sister marina, Lake Fork Marina). Sarah Kuta, The Know, "18 places you can rent a boat in landlocked Colorado," 8 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'aluminum.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of aluminum

1812, in the meaning defined above

History and Etymology for aluminum

New Latin, from alumina

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Statistics for aluminum

Last Updated

17 Jul 2019

Look-up Popularity

Time Traveler for aluminum

The first known use of aluminum was in 1812

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More Definitions for aluminum



English Language Learners Definition of aluminum

: a silver metal that is strong and light and that is used for making many products


alu·​mi·​num | \ ə-ˈlü-mə-nəm How to pronounce aluminum (audio) \

Kids Definition of aluminum

: a silver-white light metallic chemical element that is easily worked, conducts electricity well, resists weathering, and is the most plentiful metal in the earth's crust


noun, often attributive
alu·​mi·​num | \ ə-ˈlü-mə-nəm How to pronounce aluminum (audio) \

Medical Definition of aluminum

: a bluish silver-white malleable ductile light trivalent metallic element that has good electrical and thermal conductivity, high reflectivity, and resistance to oxidation and is the most abundant metal in the earth's crust where it always occurs in combination symbol Al — see Chemical Elements Table

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More from Merriam-Webster on aluminum

Spanish Central: Translation of aluminum

Nglish: Translation of aluminum for Spanish Speakers

Britannica English: Translation of aluminum for Arabic Speakers Encyclopedia article about aluminum

Comments on aluminum

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an act or instance of editing or removing

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