plural coppers
1
: a metallic chemical element with atomic number 29 that is easily formed into sheets and wires and is one of the best known conductors of heat and electricity
—often used before another noun
copper wire
a copper mug
copper mines
see Chemical Elements Table
2
: a coin or token made of copper or bronze
3
chiefly British
: a large boiler (as for cooking)
4
: any of a subfamily (Lycaeninae of the family Lycaenidae) of small butterflies with usually copper-colored wings
Synonyms
Examples of copper in a Sentence
Noun (2)
a crime novel set in the days when policemen were coppers and safecrackers were "yeggs"
Recent Examples on the Web
Tasha Tsiaperas, Axios, 5 Feb. 2025
North Queensland has large zinc reserves as well as major deposits of silver, lead, copper and iron ore, with Townsville a major processing center for the region’s base metals.
—Reuters, NBC News, 3 Feb. 2025
Finish off the look with brass and copper metal accents, which will patina over time.
—Cori Sears, Better Homes & Gardens, 1 Feb. 2025
While the stick comes in 12 shades total, two are ideal for contouring: copper and obsidian.
—Conçetta Ciarlo, Vogue, 31 Jan. 2025
See all Example Sentences for copper 
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Noun
Some Fort Worth neighborhoods keep losing internet for weeks because thieves have been stealing copper from cable lines.
—Tasha Tsiaperas, Axios, 5 Feb. 2025
North Queensland has large zinc reserves as well as major deposits of silver, lead, copper and iron ore, with Townsville a major processing center for the region’s base metals.
—Reuters, NBC News, 3 Feb. 2025
Finish off the look with brass and copper metal accents, which will patina over time.
—Cori Sears, Better Homes & Gardens, 1 Feb. 2025
While the stick comes in 12 shades total, two are ideal for contouring: copper and obsidian.
—Conçetta Ciarlo, Vogue, 31 Jan. 2025
See all Example Sentences for copper
Dictionary Entries Near copper
Cite this Entry
“Copper.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/copper. Accessed 11 Feb. 2025.
Copy CitationKids Definition
copper
1 of 2 noun
cop·per
ˈkäp-ər 
1
: a reddish metallic element that is one of the best conductors of heat and electricity see element
2
: a copper or bronze coin
3
chiefly British
: a large copper kettle or boiler
4
: any of various small butterflies with usually copper-colored wings
coppery
adjective
ˈkäp-(ə-)rē
copper
2 of 2 nounMedical Definition
copper
noun
cop·per
ˈkäp-ər
: a metallic chemical element with atomic number 29 that is ductile and malleable and one of the best conductors of heat and electricity
—symbol Cu
see Chemical Elements Table
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