noun (1), often attributive
cop·​per | \ ˈkä-pər How to pronounce copper (audio) \
plural coppers

Definition of copper

 (Entry 1 of 3)

1 : a metallic chemical element that is easily formed into sheets and wires and is one of the best known conductors of heat and electricity — 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


coppered; coppering\ ˈkä-​p(ə-​)riŋ How to pronounce copper (audio) \

Definition of copper (Entry 2 of 3)

transitive verb

: to coat or sheathe with or as if with copper


noun (2)
plural coppers

Definition of copper (Entry 3 of 3)

Synonyms for copper

Synonyms: Noun (2)

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First Known Use of copper

Noun (1)

before the 12th century, in the meaning defined at sense 1


1530, in the meaning defined above

Noun (2)

1846, in the meaning defined above

History and Etymology for copper

Noun (1)

Middle English coper, from Old English, from Late Latin cuprum copper, from Latin (aes) Cyprium, literally, Cyprian metal

Noun (2)

cop entry 2

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Time Traveler for copper

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The first known use of copper was before the 12th century

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Dictionary Entries Near copper



copper acetate

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Cite this Entry

“Copper.” Dictionary, Merriam-Webster, Accessed 19 Oct. 2021.

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More Definitions for copper


cop·​per | \ ˈkä-pər How to pronounce copper (audio) \

Kids Definition of copper

1 : a tough reddish metallic chemical element that is one of the best conductors of heat and electricity
2 : a reddish brown color copper hair


noun, often attributive
cop·​per | \ ˈkäp-ər How to pronounce copper (audio) \

Medical Definition of copper

: a common reddish metallic element that is ductile and malleable and one of the best conductors of heat and electricity symbol Cu — see Chemical Elements Table

Other Words from copper

coppery \ ˈkäp-​(ə-​)rē How to pronounce copper (audio) \ adjective

More from Merriam-Webster on copper

Nglish: Translation of copper for Spanish Speakers

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


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