Definition of erupt in US English:



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  • 1(of a volcano) become active and eject lava, ash, and gases.

    ‘Mount Pinatubo began erupting in June’
    • ‘Although Cascade volcanoes do not erupt frequently, they threaten major populations and developments.’
    • ‘Althought it is a very cold body, scientists hypothesize that watery volcanos could erupt onto the surface, and could even remain liquid for long enough to convert the organic into amino acids.’
    • ‘As soon as the lava is erupted at the surface, its properties will begin to change as a function of distance-time because of cooling.’
    • ‘Ice caps form, winds blow, volcanoes erupt, and magnetic fields are produced here on Earth and elsewhere in the Solar System.’
    • ‘Steve poked his head out the window and saw that a volcano had erupted and a hot lava flow was headed right towards the hotel!’
    • ‘Tsunamis can be caused by three reasons, Razzak recalled: an undersea earthquake, a volcano erupting within the sea, or a massive boulder plunging into the water.’
    • ‘The next day, the island's volcano erupts and an earthquake follows.’
    • ‘‘That may tell us that a rock was erupted by a volcano or was laid down by water or some other process,’ Crisp says.’
    • ‘However, whereas volcanic activity ceased on the Moon several billion years ago, Io still has about a dozen volcanoes erupting at any one time.’
    • ‘The active volcanoes erupt a type of rock known as basalt.’
    • ‘Intended to improve the understanding of how these volcanos erupt, the system investigates the dynamics of the entire magma system below the island.’
    • ‘A rogue wave nearly buries the boat off Bermuda, and while touring Montserrat, an active volcano erupts.’
    • ‘Volcanoes erupt not simply because magma is hot, but because hot, rising magma turns underground water to steam, which then expands explosively.’
    • ‘One of them is why volcanoes commonly erupt lavas that vary so widely in composition - a major factor in creating the planet's surface.’
    • ‘Both features are characteristic of calc-alkaline magmas erupted in subduction-related volcanic arc environments.’
    • ‘Shield volcanoes tend to erupt non-explosively, mainly pouring out huge volumes of fluid lava.’
    • ‘When volcanoes erupt, Lockwood is often nearby.’
    • ‘The volcanic pile built up above sea level so that lavas began to be erupted subaerially.’
    • ‘Suppose that the mountain erupts, leaving lava around the countryside.’
    • ‘Volcanoes erupt under glaciers, causing gigantic floods that make the island a fearsomely dangerous place for human colonization.’
    emit lava, belch lava, become active, flare up, eject material, vent material, explode
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    1. 1.1 Be ejected from an active volcano.
      ‘hot lava erupted from the crust’
      • ‘These sediments are melted and generate magma, which buoys up to earth's surface and erupts explosively at major island arc volcanic systems.’
      • ‘As the magma approaches the surface it occasionally erupts and forms volcanoes.’
      • ‘In turn, the melt rises toward the surface and erupts in spectacular volcanoes.’
      • ‘Possible evidence for this theory concerns the brown ridges that mark the moon's terrain, thought to be caused by instant freezing of liquid water erupting from beneath the ice crust.’
      • ‘That eruption lasted thirteen days and built a three - to four-mile-long ridge of volcanic rock from lava erupting through a fissure buried by the ice.’
      • ‘The current lava flows are arms of the larger lava flow that erupted earlier this year on Mother's Day.’
      • ‘The large volumes of lava erupted in the main phase of flood basalt volcanism seem to have overwhelmed any hydromagmatic influence.’
      emit, discharge, eject, expel, spew out, belch, belch out, pour, pour out, disgorge, give off, give out
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    2. 1.2 (of an object) explode with fire and noise resembling an active volcano.
      ‘smoke bombs erupted everywhere’
      • ‘It erupted into a ball of flame and exploded in a huge hellish ball of smoke and flame, which consumed another car.’
      • ‘After spitting a few sparks, it erupted into a burning fire.’
      • ‘The benzene was really leaping around, splattering and erupting.’
      • ‘A spark caused by faulty wiring erupted into a blaze that swept through the pure oxygen atmosphere within the capsule.’
      • ‘The bed erupted into flames, trapping the two women for a time before they managed to break a window in the caravan and escape, both with more than 40 per cent burns, the jury heard.’
      • ‘A moment later, it erupted into a ball of fires and disintegrated into a pile of ash.’
      • ‘The York couple whose car erupted into flames which rapidly spread to two homes and three more vehicles have told of their frightening ordeal.’
      • ‘The Rogers' homestead erupted into a gigantic, exploding fireball.’
      • ‘An eyewitness said the jet veered sideways off the right side of the runway and erupted into flames as it hit a runway fence.’
      • ‘When the car erupted into a ball of fire, Jason did not know what hit him.’
      • ‘When they collided, the air erupted with extremely hot steam.’
      • ‘This will cause the hot oil to erupt with possible dire consequences.’
      • ‘Instantly, gray smoke erupted, flowing out of the cauldron, as if frozen in time.’
      • ‘A blast of fire and smoke erupted into the rainy night, casting a shadow onto the sight.’
      • ‘The entire café erupted into an incoherent mass of noise.’
      • ‘Gay was knocked unconscious by the impact, and a small fire under the wheelwell erupted into a major blaze.’
      • ‘The floor, walls, and any hapless machine that happened to be nearby erupted into fire and smoke.’
      • ‘All three of us were blasted to the ground as the jeep behind us erupted into a ball of fire.’
    3. 1.3 Break out or burst forth suddenly and dramatically.
      ‘fierce fighting erupted between the army and guerrillas’
      ‘cheers erupted from the crowd’
      • ‘Thus, once the new year has begun, I'm afraid that conflicts regarding the power plant issue will continue to erupt.’
      • ‘The see-saw battle erupted into a clash between the rival fronts on the floor of the council hall earlier this month.’
      • ‘The most vivid memories of this quarter final will not be of the skilful play of Lismore but the five minutes of first-half madness when the game erupted into violence.’
      • ‘Even fewer thought it would erupt over an issue so seemingly trivial.’
      • ‘However, as in Australia and Ireland, social discord erupted on the issue of compulsory military service overseas.’
      • ‘But tensions between the groups erupted into violence.’
      • ‘That may have rankled the Church - but nothing like as ferociously as the gay marriage issue which has since erupted.’
      • ‘Moreover, if the cross-strait issue erupts into conflict, this will be a signal for conflict among other powers in East Asia.’
      • ‘We thought the women's issue would erupt first.’
      • ‘The moment the door slid shut behind the admiral, the questions erupted in a loud flow.’
      • ‘The city's Neighbourhood Mediation Service is helping to settle disputes that can erupt over issues such as noise pollution, boundaries, nuisance and intimidation.’
      • ‘A fresh row has erupted over the thorny issue of a northern bypass for Witham.’
      • ‘The debate on the issue of having an elected Mayor is hotting up, and this week a row erupted over the estimated costs.’
      • ‘Earlier this year a war of words about this issue erupted among Australia's science communicators.’
      • ‘The Reformation erupted over just this issue in the sale of indulgences.’
      • ‘Long-standing grievances over environmental and health issues erupted soon after the downfall of Suharto.’
      • ‘It is a different issue that a controversy has erupted in the deal.’
      • ‘I continue to feel it is such a shame this issue has erupted to the extent that it has.’
      • ‘First of all though, a comment about genes and cloning, an issue which erupted once more this week.’
      • ‘The affair erupted into a national controversy late last year when it was revealed the State had been illegally charging residents of nursing homes.’
      break out, flare up, blow up, boil over, start suddenly
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    4. 1.4 Give vent to anger, enthusiasm, amusement, or other feelings in a sudden and noisy way.
      ‘the soldiers erupted in fits of laughter’
      • ‘Anger erupted in a meeting when district council lawyers outlined their reluctance to prosecute feeders and asked town council officials to prove the pigeon problem even existed.’
      • ‘I erupted into near hysterical laughter at that point because what the hell?’
      • ‘Accrington erupted into a sea of red and white as jubilant fans celebrated the promotion of the town's football team to the Conference.’
      • ‘When the Trafford were declared winners by one point the Bury contingent in the 200-strong audience erupted into catcalls and booing.’
      • ‘A funny snorting noise was Kaethe's only warning before Saber erupted into chortling, hysterical glee.’
      • ‘I erupted in a sudden fit of laughter that left my eyes and nose streaming.’
      • ‘At one of York's premier football grounds, the air of anticipation quickly erupted into ecstasy at the first goal.’
      • ‘No surprise, then, that the public erupted in anger.’
      • ‘When those actions came to light this February, councillors erupted in anger, almost derailing the whole process once again.’
      • ‘David coped by continuing to fulfill his sibling caretaking responsibilities at home, while erupting with fits of anger, foul language, and violent outbursts at school.’
      • ‘Local theaters in other cities certainly haven't erupted into applause.’
      • ‘They sat in thin-lipped, awe-struck silence while he played, then, without fail, erupted into a standing ovation at the end of every song.’
      • ‘First they clung to each other, then they erupted into tears and broad smiles as they hugged mothers and fathers on the tarmac of Tokyo's Haneda airport.’
      • ‘The room erupted into a cacophony of noise as Ree and Marsey bombarded Bushby with questions.’
      • ‘His eyes straying over the windows, his breath caught in his throat as a new burst of anger erupted in his veins.’
      • ‘An emergency meeting of University of Colorado regents erupted into chaos.’
      • ‘For a brief time late in the decade, things improved, but after 1929, working-class anger erupted.’
      • ‘The hum intermittently erupted into hypnotic chanting as the camera edged along the line-up, each player seeming to get younger and smaller all the while.’
      • ‘Benny and Mark erupted into cheers as Anna ran the bases.’
      • ‘More anger erupted at a council meeting hastily convened before the deadline for deciding both applications, when locals said they had only been given very short notice to turn up.’
      • ‘A courtroom in New York City erupted into applause today as convictions were dismissed for five men.’
    5. 1.5 (of a pimple, rash, or other prominent mark) suddenly appear on the skin.
      • ‘Shadows of pain echoed over his body, from the feeling of a limb being severed, to the feeling of a thousand boil poxes erupting from his skin all at once.’
      • ‘When the villagers took her body in a boat for the customary sea burial, they noticed that small boils were erupting all over her skin, and tiny filaments were emerging from the boils.’
      • ‘Today, the hospital saw a child who had sores that had just erupted.’
      • ‘The pustules erupt repeatedly over months or years.’
      • ‘Korneff has a constant skin infection - there are boils constantly erupting on the back of his neck.’
      • ‘What was not explained was that for a couple of days afterwards, spots can erupt and you can feel strange, or more emotional than usual.’
      appear, break out, flare up, come to a head, burst forth, make an appearance, pop up, emerge, become visible
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    6. 1.6 (of the skin) suddenly develop a pimple, rash, or mark.
      • ‘Was it a co-incidence the skin erupted after the addition of this treatment?’
      • ‘However, this also means that Fiona has been exposed to the virus, and may well erupt in spots a fortnight from now.’
      • ‘Five college kids head into the great outdoors, only to be stricken with an illness that makes their skin erupt in sores.’
      • ‘First the skin itches, then it erupts into red welts.’
      • ‘I sucked in air, feeling goosebumps and tingles erupt all over my skin.’
      • ‘Wondering how much effect going my counselling will have, as these days, my skin only really seems to erupt when I'm not processing poisonous stuff any other way.’
      • ‘My stomach dipped, like I was racing down a roller coaster, and goosebumps erupted all over my skin.’
      • ‘Cara Duncan, from Aberdeen, has been swathed in bandages since she was three months old to stop her skin erupting in painful blisters from an allergy to everyday items.’
      • ‘She has just erupted in the characteristic spots of the disease more widely known as chickenpox.’
      • ‘Cursed with allergies in his first years, Koby often erupted in hives and eczema.’
      • ‘His eyes glazed, he opened his mouth, and his skin erupted in big round beads of cold sweat.’
      • ‘Flawless skin suddenly erupts with pimples as one grows up.’
      • ‘It was easy to be so defiant against facial hair, despite its persistent attempts to erupt from our skin, because back then we were too young to grow anything more than a whisper of a whisker.’
      • ‘Goosebumps erupted over his skin and he shuddered against me.’
    7. 1.7 (of a tooth) break through the gums during normal development.
      • ‘The first teeth to erupt are the incisors which appear at around 6-9 months.’
      • ‘When do baby teeth erupt? Not soon enough for most parents, I have found.’
      • ‘Teeth missing from the normal series may have failed to develop or to erupt or have been lost prematurely.’


Mid 17th century: from Latin erupt- ‘broken out’, from the verb erumpere, from e- (variant of ex-) ‘out’ + rumpere ‘burst out, break’.