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

These official Apple cases come in satisfying colors of buttery leather, with aluminum buttons that match the case as well as a microfiber lining to protect your iPhone. CNN Money, "Protect your iPhone 11 with these stylish and rugged cases," 16 Sep. 2019 Some homes continue to have aluminum wiring for electricity, which presents a very large fire hazard, according to Deputy Fire Marshal Lt. Washington Post, "Fire can be risky, deadly drawback of living in mobile homes," 16 Sep. 2019 The company also has an aluminum die casting plant in Bedford and a components holding plant in Kokomo. Alexandria Burris, Indianapolis Star, "How the UAW strike against GM affects Indiana," 16 Sep. 2019 Coast Guard Petty Officer Ryan Noel said the people on the 32-foot aluminum vessel were commercial divers., "Three people were rescued after a commercial dive boat overturned off the Nahant coast Friday morning, officials said.," 14 Sep. 2019 Special exterior design cues feature a Willys hood decal, unique black 17-inch aluminum wheels with gray pad print and a gloss black sport grille. Houston Chronicle, "Good news for Jeep enthusiasts," 13 Sep. 2019 His family sat on aluminum chairs in the middle of the gym — about 40 of them wearing the same red T-shirt in honor of Skylar. Jeff Seidel, Detroit Free Press, "Jim Harbaugh sends heartbreaking gift to funeral of Michigan boy who died on field," 13 Sep. 2019 The housing features military-grade aluminum with a silicon skin. John Goodspeed,, "Scouting interesting stuff to make hunts more fun," 12 Sep. 2019 This Defender, like its Range Rover cousins, is now an aluminum monocoque chassis, something that Land Rover says is three times stiffer than anything else the brand has built until now. Jonathan M. Gitlin, Ars Technica, "The 2020 Land Rover Defender is a 21st century take on a 4×4 icon," 12 Sep. 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

9 Oct 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

What made you want to look up aluminum? Please tell us where you read or heard it (including the quote, if possible).


to fake an opponent out of position

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