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 nounaluminum 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 This aluminum frame bike promises its front suspension will keep the ride smooth and its wheels glued to the trail. Tanya Edwards, CNN Underscored, "Everything you need to know before you start biking again," 25 June 2020 Etched aluminum switches on the steering wheel and dash look great, but are not the most legible. Mark Phelan, Detroit Free Press, "Mercedes’s new small SUV a winner, despite goofy driver-assist feature," 24 June 2020 Ironically, the three U.S. aluminum producers -- Alcoa Corp., Century Aluminum Co. and Magnitude 7 Metals LLC -- disagree whether tariffs should be reimposed. Joe Deaux,, "U.S. Poised to Slap 10% Tariff Again on Aluminum From Canada," 23 June 2020 The shipyard builds two aluminum vessels for the Navy: A futuristic Littoral Combat Ship and a multipurpose catamaran called the Expeditionary Fast Transport (EPF). al, "Austal USA gets $50 million to steel itself for the future," 23 June 2020 Before returning to government in 2018, Strauss served as the chief legal officer for aluminum producer Alcoa Corp. Benjamin Weiser,, "Trump fired her boss. Now she is taking cases that incensed White House.," 21 June 2020 The 3-by-5-inch aluminum plate, installed on the left side of the rover chassis, shows Earth supported by the ancient symbol of the serpent entwined around a rod to represent the global medical community. Ashley Strickland, CNN, "NASA's Perseverance rover will launch to Mars next month with a global tribute to health care workers," 20 June 2020 Kudos from space: The next rover on Mars will have an aluminum plate as a tribute to healthcare workers who have been fighting the pandemic. Cara Richardson, USA TODAY, "Coronavirus news and updates: Does Florida's spike in cases make it a new 'epicenter'?; mask rules on airplanes from the FAA," 19 June 2020 Danish designer Jakob Wagoner is responsible for the sleek layout of these swanky headphones, which pair great noise cancellation and deep bass output with a leather and aluminum frame. Popular Science, "Over-the-ear headphones to immerse you in high-quality sound," 19 June 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

28 Jun 2020

Cite this Entry

“Aluminum.” Dictionary, Merriam-Webster, Accessed 7 Jul. 2020.

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More Definitions for aluminum


How to pronounce aluminum (audio)

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

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