Definition of aluminum in US English:


(British aluminium)


  • The chemical element of atomic number 13, a light silvery-gray metal.

    Aluminum is the most abundant metal in the earth's crust and is obtained mainly from bauxite. Its lightness, resistance to corrosion, and strength (especially in alloys) have led to widespread use in domestic utensils, engineering parts, and aircraft construction

    • ‘Mix aluminium, lead, copper and steel components incorrectly and you will get rapid rusting.’
    • ‘Strollers made from steel and aluminum are very durable and will last you a lot longer.’
    • ‘Small amounts of other metals are added to aluminum to make harder alloys for most uses.’
    • ‘The interior also gets the silver treatment, with polished aluminum all over.’
    • ‘The use of aluminium and steel in car production is thought of as something new.’
    • ‘You could make the analogy that it has the weight of aluminum with the strength of steel.’
    • ‘Modern formal gardens use water in geometric pools and metals like steel and aluminium in structures.’
    • ‘In the short term, it may be late to take advantage of the move in copper, aluminum and oil.’
    • ‘Officials said materials made of plastic, aluminum, glass and metals will have to be recycled.’
    • ‘All you see is a big slab of aluminum running across the dashboard.’
    • ‘Those containing magnesium or aluminium generally work by neutralising the stomach acid.’
    • ‘Aluminum dust captured from the air is recycled and used to produce new aluminum.’
    • ‘He got the formula right, but had not looked up the melting point of aluminum.’
    • ‘The other way is to coat the steel surface with a metal compatible with aluminum.’
    • ‘The ease with which aluminum may be fabricated into any form is one of its most important assets.’
    • ‘The case is steel, not aluminium, but weight is not an issue with a case of this small size.’
    • ‘Metallic elements offer a plethora of textures from silky smooth silver to brushed aluminium.’
    • ‘One myth is that aluminum is not sufficiently strong to serve as a structural metal.’
    • ‘He also put a frame around the lamp to keep it cool and made the fixture of aluminum rather than steel.’
    • ‘The major incentive for employing aluminum is its weight saving compared to steel.’


Early 19th century: from alumina + -ium.