copper

1 of 3

noun (1)

cop·​per ˈkä-pər 

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

copper

2 of 3

verb

coppered; coppering ˈkä-p(ə-)riŋ 

transitive verb

: to coat or sheathe with or as if with copper

copper

3 of 3

noun (2)

plural coppers

: police officer

Synonyms

Noun (2)

• policeman
• officer
• cop
• constable [chiefly British]

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

Noun

This latest version is available in three different shades: cobblestone, eggplant purple and copper tone. —Martino Carrera, Footwear News, 1 July 2025

The bathroom leans into luxury with a spa-like vibe, complete with a steam shower and a jacuzzi tub wrapped in marble and copper finishes—a perfect place to unwind after a long day, whether rehearsing a pas de deux or trying on clothes at Bergdorf’s. —Abby Montanez, Robb Report, 30 June 2025

The limestone facade is pearl-white again, the green copper roof looks brand new and the delightfully curious dozen sculptures of unclothed women adorning the exterior appear to be ready for their collective closeup, modesty be damned! —David Weiss, Forbes.com, 30 June 2025

The Democratic Republic of the Congo has substantial reserves of gold, cobalt, and high-grade copper that have been inaccessible due to the security risks and underdeveloped infrastructure, the International Trade Administration says. —Francesca Chambers, USA Today, 28 June 2025

Word History

Etymology

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

First Known Use

Noun (1)

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

Verb

1530, in the meaning defined above

Noun (2)

1846, in the meaning defined above

Phrases Containing copper

• chromated copper arsenate
• copper beech
• copper-bottomed
• copper pyrites
• copper sulfate

Rhymes for copper

• chopper
• cropper
• dropper
• pauper
• popper
• proper
• shopper
• stopper
• topper
• whopper
• eavesdropper
• grasshopper

Kids 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

ˈkäp-(ə-)rē

adjective

copper

2 of 2 noun

: police officer

Medical 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

coppery

ˈkäp-(ə-)rē 

adjective