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 Either way, the water-tight case, made from military-grade aluminum, is exceptionally tough. Adrienne Donica, Popular Mechanics, "The Best First Aid Kits to Keep on You For Emergencies," 5 May 2021 Heesen’s 262-foot Project Cosmos, which is currently in build IRL and will mark the yard’s first superyacht built from aluminum, is depicted soaring through the galaxy with a couple of X-Wings by her side (above). Rachel Cormack, Robb Report, "Star Wars Day Is Taking Over the World’s Most Expensive Superyachts (Again)," 4 May 2021 Metal furniture is popular and comes in numerous options, from inexpensive and lightweight aluminum to sturdier and more expensive stainless steel or wrought iron. Washington Post, "How to choose outdoor furniture that will last," 29 Apr. 2021 It’s made from aluminum and has a nonstick interior, as well as handles designed to stay cool while cooking. Zoe Malin, NBC News, "Best rated cookware sets of 2021 at major retailers," 6 Apr. 2021 It is made from heavy cast aluminum on the base that is warp-proof. Chris Hachey, BGR, "Best Electric Griddle," 30 Mar. 2021 Cornhole is a must-have game at any BBQ, and this patriotic set from GoSports is made from lightweight aluminum for easy storage and setup. Lizzy Briskin,, "What you need to host a BBQ," 24 Mar. 2021 This small yet powerful tool is crafted from aluminum and zinc alloy and allows creams and oils to penetrate deeper into the dermis, boosts circulation and elasticity, and drains and sculpts the face for firmer, tighter, better skin. Joseph Deacetis, Forbes, "Understanding Skincare That Will Make Your Feel Good Inside And Out.," 1 Mar. 2021 Made from aluminum alloy, the machine weighs just 7 ounces and measures just over 5 inches long. Stack Commerce, Popular Science, "Give your shoes a fresh boost and kill any bacteria in the process," 23 Dec. 2020

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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Time Traveler for aluminum

Time Traveler

The first known use of aluminum was in 1812

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Statistics for aluminum

Last Updated

12 May 2021

Cite this Entry

“Aluminum.” Dictionary, Merriam-Webster, Accessed 12 May. 2021.

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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

More from Merriam-Webster on aluminum

Nglish: Translation of aluminum for Spanish Speakers

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

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