Main definitions of copper in English

: copper1copper2

copper1

Pronunciation /ˈkäpər/ /ˈkɑpər/

Translate copper into Spanish

noun

  • 1

    (also Cu)
    A red-brown metal, the chemical element of atomic number 29.

    Copper was the earliest metal to be used by humans, first by itself and then later alloyed with tin to form bronze. A ductile, easily worked metal, it is a very good conductor of heat and electricity and is used especially for electrical wiring

    ‘In addition, fruit juices are rich in essential minerals like iron, copper, potassium, sodium, iodine and magnesium.’
    • ‘Silver fillings are actually made of a combination of metals including silver, tin, copper and mercury.’
    • ‘Men usually work with metals such as copper, brass, and aluminum to craft decorative plates, wall hangings, and utensils.’
    • ‘It is high in vitamin A and the B group vitamins as well as copper, magnesium, potassium and phosphate.’
    • ‘Unlike aluminum, copper metal is fairly easy to obtain chemically from its ores.’
    • ‘For example, tobacco plants can absorb heavy metals, mercury, copper, and lead.’
    • ‘Coins are made using various alloys of metals like nickel, copper and zinc.’
    • ‘Sweating flushes toxic metals, such as copper, lead and mercury, and removes excess salt, a benefit for those with mild hypertension.’
    • ‘Over the centuries the techniques of making all forms of metal ware: pewter, copper, brass and bronze, iron and steel, have varied.’
    • ‘As my predicted recovery of the American economy gets speed, the world will buy more of our diamonds, gold, copper and uranium again.’
    • ‘And don't install dissimilar metals such as copper and steel in the same wall.’
    • ‘Jason Mernick is a California-based artist who works with metals such as copper and stainless steel.’
    • ‘Radiation, lead, and other heavy metals, such as copper and mercury, could hurt the baby.’
    • ‘Creep is the slow flow of a non-ferric metal like copper, brass and lead under force.’
    • ‘Laboratories in larger wineries may also be equipped to test for mineral elements such as iron, copper, sodium, and potassium.’
    • ‘During the Bronze Age Ireland had a significant metal industry, and exported artefacts in bronze, copper, and gold to Britain and the Continent.’
    • ‘These were supplanted by blocks into which metal (usually copper or brass) was inlaid.’
    • ‘In modern times, bronze is an alloy of copper and any metal except zinc.’
    • ‘How much did they allocate to the people whose land contained the copper?’
    • ‘Some of the material is pure, but much of it contained a little copper.’
  • 2British A copper coin, especially a penny.

    ‘you could hire a raft for a few coppers’
    • ‘She stopped by a fruit stand and got two apples for three copper pieces.’
  • 3A reddish-brown color like that of copper.

    ‘she had copper-colored hair’
    • ‘In other colourful news, I've just had some reddish / copper lowlights put in my hair.’
    • ‘There weren't many people in my school with copper coloured hair.’
    • ‘Looking closely, there's a hint of copper colouring in the larger scratch.’
    • ‘As to the colour, fine copper slices are placed in diagonal sections through the back and sides.’
    • ‘There was quite a pile of copper coloured hair in a ring around the chair when she finished.’
    • ‘The camera switches across to the other side of my mouth and focuses on a huge filling that gleams two distinct colours, copper and silver.’
    • ‘Striking copper coloured bark on the stems and trunk peels off in large pieces to reveal lighter new bark below making it irresistible to stop and touch.’
    • ‘We stopped a few times to photograph some of these views, especially the valley oases overshadowed by the colourful mountains, streaked with amber, brown, copper and deep purple.’
    • ‘The popular colours are beige, cream, brown and copper which are ideal for showing off the intricate work.’
    • ‘McKinnon has an explosion of curly, deep copper coloured hair around features that can only be called elfin.’
    • ‘At this stage tie in a length of copper or fine red coloured wire.’
    • ‘You will see copper complexions and the lighter shades of pale.’
    • ‘Her hair was curling and glossy and copper coloured.’
    • ‘Ellis says the copper colour is typical of an English style ale.’
    • ‘Leaves are changing color to intense reds and pinks, vivid oranges and yellows, and more subdued browns and coppers as they fall.’
    • ‘All of the trees were gradually becoming painted with the familiar crimsons, coppers, golds, and bronzes.’
    • ‘It then rises to show an identical backdrop, now stained with the colors of archaic art: coppers and golds, turquoises and deep blues, flashes of vermilion.’
    • ‘Two rules to remember: Keep lighter shades on top, and choose complementary colors like warm golds and coppers.’
    • ‘Those orange copper eyes were penetrating his mind, telling him to stop where he was and face the creature.’
    • ‘Under the large hood two copper eyes studied what was currently becoming clear to their vision.’
  • 4with modifier A small butterfly of North America and Eurasia. The upper surface of its wings is typically bright reddish-orange or purple.

    Genus Lycaena, family Lycaenidae: numerous species, including the American copper (L. phlaeas) of the eastern US and arctic North America

transitive verb

[with object]
  • Cover or coat (something) with copper.

    ‘some iron hulls were sheathed with wood and then coppered’
    • ‘coppered pins’
    • ‘Drake watched it from atop the watchman's truck, against the pole that held the beat-up and coppered bell.’
    • ‘Everything was made of gold, coppered from age.’

Origin

Old English copor, coper (related to Dutch koper and German Kupfer), based on late Latin cuprum, from Latin cyprium aes ‘Cyprus metal’ (so named because Cyprus was the chief source).

Main definitions of copper in English

: copper1copper2

copper2

Pronunciation /ˈkäpər/ /ˈkɑpər/

Translate copper into Spanish

noun

informal British
  • A police officer.

    • ‘How do you know the coppers won't know you weren't there?’
    • ‘Unless perhaps you were a copper going undercover.’
    • ‘Since Monday I have been counting the number of coppers, cop cars, dog handling units, malicious arrests and good-humoured stop-and-searches I've spotted in Hackney.’
    • ‘‘So that's what he's calling himself now,’ said the junior copper, a mere Detective Sergeant.’
    • ‘I told him if he tried to contact me I'd get an intervention order and he ranted and raved a bit but with the two coppers - sorry the two police officers - there he didn't dare do anything.’
    • ‘It sounds too much like a cop-out from the coppers, because the problem is so large that it takes up valuable police resources.’
    • ‘Amazingly, the police had not bothered to place a copper outside the scene of an attempted murder.’
    • ‘Here are the latest thoughts from Victoria Police Assistant Commissioner Bob Hastings, who presides over the coppers manning the checkpoints.’
    • ‘It's the police force, the good coppers working for us.’
    • ‘North Yorkshire's top copper joined the police in 1975.’
    • ‘He added: ‘He arrived in an ambulance, was taken in by two coppers and left later in a police van.’’
    • ‘Another police car pulled up and another couple of coppers ambled out.’
    • ‘It was just my luck that at that moment a police van with nine or 10 coppers in it drove by.’
    • ‘He's 43, been a copper for 25 years and has a pedigree of detective work, having covered ganglands, drug trafficking and extortion.’
    • ‘And even against the increasing daylight we could make out that they were uniformed coppers, and that each of them was holding a push bike!’
    • ‘Search warrants in hand, the coppers nicked some computers, video game manuals, Blockbuster movie rental cards, DVDs, a microphone and a power cord.’
    • ‘This is a proper copper who has busted cocaine rings in the past.’
    • ‘Local communities want to see regular patrols - even though it is estimated that only once in every eight years will a copper actually pass a crime in commission.’
    • ‘He knew the house belonged to a copper because there was a uniform hanging up.’
    • ‘He must have been visiting someone there, a copper probably.’

Origin

Mid 19th century from cop+ -er.