Definition of crust in US English:



  • 1The tough outer part of a loaf of bread.

    ‘a sandwich with the crusts cut off’
    ‘I tore off several pieces of crust from the loaf’
    • ‘Like always, he cut off the crust before eating it.’
    • ‘Cut the crusts away from the bread and soak the slices briefly in water, then squeeze them until almost dry.’
    • ‘Just cut off the crusts of some slightly stale bread, and whiz the bread in a food processor.’
    • ‘Remove the crusts from the bread and cut a piece to fit the base of a one litre pudding basin or bowl.’
    • ‘Her accompanying garlic bread is real bread with a proper crust, spread with freshly prepared garlic butter and chopped parsley.’
    • ‘But the more evident marauder is pigeons, thanks to the sandwich crusts left by lunchers and the feed spread by misguided bird fanciers.’
    • ‘The sandwiches were on white bread and every crust was cut off neatly from the edge.’
    • ‘They gave their Great Niece the red carpet treatment, cooking up a feast of scones with jam and cream, fruit cake, sponge cake, Anzac biscuits and a genteel plate of sandwiches with the crusts cut off.’
    • ‘The water will start to steam, making the air in the oven moist, which will help the bread to rise and give it a nice, crisp crust.’
    • ‘The exterior crust is supposed to be crispy and golden brown, but this one tastes like cardboard.’
    • ‘The slices of thick, airy, white loaf with burnt crusts lathered in creamy butter were completely moreish.’
    • ‘If done wrong it can be as bland as a slice of white bread with the crusts cut off.’
    • ‘She does everything but cut the crusts off his toast soldiers to go with his boiled egg.’
    • ‘These are made of white toast with their crusts cut off, and are filled with smoked salmon and prawn mayonnaise.’
    • ‘But it's not a roll because bread rolls have a crust and barm cakes are soft.’
    • ‘The traditional bread, especially in the northwest, is broa, a grainy corn bread with a thick crust.’
    • ‘It was a classic British summer tea; small smoked salmon sandwiches with the crusts cut off; tiny scones with jam and cream the size of a 10p piece and miniature strawberry tarts.’
    • ‘In bread baking, you add a little bit of salt so that, instead of a lumpy, haphazard crust, you get gorgeous, round, smooth loaves.’
    • ‘I got a very dry roll with my soup today, and caught myself removing the inner soft bread, beyond the tough crust, and rolling it up to plop into the soup.’
    • ‘And they all traipsed out for another round of triangular sandwiches with the crusts cut off and a wee cup of tea served in the best china.’
    outer layer, outer part, outside, exterior
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    1. 1.1 A hard, dry scrap of bread.
      ‘a kindly old woman might give her a crust’
      • ‘Who do you think is really responsible for the legions of ragged students begging for crusts of bread in Cambridge and Berkeley?’
      • ‘How often have restaurant forgotten that bread is part of the meal and have given their customers stale, hard crusts.’
      • ‘Before long he had me saving scraps of bacon and stray crusts.’
      • ‘Others let their babies chomp down on their fingers, or offer dried crusts of bread or peeled carrot sticks (stay nearby in case of choking).’
      • ‘No one shook with more anger than when they glimpsed a rat contentedly gnawing on a slice of carrot or crust of bread.’
    2. 1.2 A layer of pastry covering a pie.
      • ‘It was not lacking any salt, and the crust was superb.’
      • ‘So does the lobster pot pie, which contains an assortment of vegetables, a dose of heavy cream, plus a crumbly pastry crust.’
      • ‘As with the 18th century version, the dish will be finished off with a pastry crust.’
      • ‘You may already be familiar with its crispy crust pastry and mildly spiced creamy filling but now you can prepare this tasty French delicacy in your own kitchen.’
      • ‘The potato was badly discoloured and the pastry crust was decidedly soggy.’
      • ‘Whether you serve a fruity deep-dish cobbler draped with a homemade pastry crust or a lush pumpkin cheesecake, keep the servings small.’
      • ‘Baked in the oven under a pastry crust and served hot with boiled potatoes and a green vegetable it's a dish fit for a king.’
      • ‘Sometimes this was encased in a rich crust of pastry or dough similar to saffron bread, a form reminiscent of the Scottish black bun.’
      • ‘Its pastry crust speaks to a diner of infinite potential, obscuring what's within and defying conventional conceptions of identity.’
    3. 1.3 A hardened layer, coating, or deposit on the surface of something, especially something soft.
      ‘a crust of snow’
      • ‘It is as if the lava from an erupting volcano had hardened into a crust just before it engulfed the neighborhood.’
      • ‘Cementitious products form a crust over the soil surface once they have set.’
      • ‘The great gray is extremely powerful, able to crash through thick crusts of snow to seize rodents scurrying beneath.’
      • ‘The lowlands of the island are blanketed with muskeg, a type of bog up to 3 feet deep with a hard crust on top.’
      • ‘After a late start due to a very wet spring, a combination of more rain and a mini-heatwave baked the soil to a hard crust, capping over the seedlings and killing them.’
      • ‘For example, terms exist for powdery snow, snow that fell yesterday, and snow that is soft underneath with a hard crust on top.’
      • ‘With each step, their hooves press lightly, then break through the icy crust atop the shallow snow.’
      • ‘I had the warm chocolate tart, with a soft crust hiding its delectable molten interior, while a chocolate sauce kept the whole mélange from being cloying.’
      • ‘We walked on and on, yet I felt no weariness, just a little discomfort as the filth that clung to me began to harden into a crust.’
      • ‘Many canopy trees have protruding crowns, and light availability at the surface of the canopy crust should also differ depending on the position relative to the apex of the crown.’
      • ‘At this point, the ulcers may develop thin crusts or verrucous changes or may continuously drain serous fluid.’
      • ‘At first it seems like we are going to make good progress because the top crust of the snow is frozen enough to hold our body weight.’
      • ‘It is never more than around half a metre deep, and below it sits a hard crust of limestone, a stratum of free-draining limestone clay, then gravel and finally an enormous water table.’
      • ‘What's under threat here is simply civilization, the thin crust we lay across the seething magma of nature, including human nature.’
      • ‘A thin crust of coral is rooted in the sea bed by a fixture of limestone.’
      • ‘Lines as corny as this can have someone in the audience break into laughter, and the thin crust of magic that keeps the film afloat will fall into splinters.’
      • ‘Additional signs include itchy skin located around ears, head and neck as well as thick crusts around the outer ear and possible crusts and scales on the neck, rump and tail.’
      • ‘Making a judgement based on his outer crust you might assume he could be facile and lightweight in a clever kind of way.’
      • ‘Despite its thin crust of moderate strength, the clay becomes much softer with depth.’
      • ‘The soil, it found, has the consistency of wet sand or clay and is covered by a thin crust… of something.’
      covering, layer, coating, cover, coat, sheet, thickness, film, skin
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    4. 1.4 The outermost layer of rock of which a planet consists, especially the part of the earth above the mantle.
      ‘the earth's crust’
      ‘at the midocean ridge new crust is formed’
      • ‘Magmas erupted in continental volcanic arcs typically contain components from many sources in the crust, lithospheric mantle and asthenosphere.’
      • ‘Slab pull is the theory in which subduction of the earth's crust is thought to pull the plates apart.’
      • ‘We know that around this time a huge wound opened up in the crust of the Earth; it was like a volcano only very, very much bigger.’
      • ‘Below the crust is the mantle, a dense, hot layer of semi-solid rock approximately 2,900 km thick.’
      • ‘So, if there was an early origin of life on the earth one expects that anything which was living in the upper layers of the crust to have been essentially sterilised.’
      • ‘I am talking about the crust of the Earth moving.’
      • ‘The rising sea level will only be partly offset by geological changes in the crust of the earth, which are pushing up parts of the island's land mass.’
      • ‘More than a hundred hotspots beneath the Earth's crust have been active during the past 10 million years.’
      • ‘Also during this time, the Earth's crust cooled enough that rocks and continental plates began to form.’
      • ‘Earth's crust essentially floats on the denser mantle that behaves as a very viscous fluid.’
      • ‘These seismic waves in the crust are what people feel when they experience an earthquake.’
      • ‘Applied over time, these stresses cause the rocks of the crust to fold and fracture.’
      • ‘It is also possible that upper mantle mafic plumes acted as a heat source for, and made some contribution to, the melting of more felsic rocks in the lower crust.’
      • ‘In these areas of the Earth's crust, magmatic rocks lie only a short distance below the sea floor.’
      • ‘These include silicon dioxide, or silica, the most abundant mineral in Earth's mantle and crust.’
      • ‘The anorthosite rock then cooled to form a solid crust above the hot, liquid mantle.’
      • ‘If the cracks extend deep enough, the seawater can come into contact with mantle rocks that underlie the crust.’
      • ‘Oxygen is the most abundant element in the crust of the Earth.’
      • ‘Geochemistry generally concerns the study of the distribution and cycling of elements in the crust of the earth.’
      • ‘This will allow scientists to study Mercury's mass distribution, including variations in the thickness of its crust.’
    5. 1.5 A deposit of tartrates and other substances formed in wine aged in the bottle, especially port.


[no object]
  • 1Form into a hard outer layer.

    ‘the blisters eventually crust over’
    • ‘Fields planted ahead of the rain exhibit crusting.’
    • ‘It can be slow to heal, can crust up and can scab for many weeks.’
    • ‘Nickel allergies cause symptoms like itching, crusting, and blisters.’
    • ‘After a long moment, the blood froze, crusting into dryness.’
    • ‘Mild side effects may include an unpleasant smell or taste, or irritation, crusting and bleeding in your nose, which may be especially noticeable during the winter.’
    • ‘Infection by bacteria living on the surface of the skin can cause weeping of fluid (‘wet’ eczema) and crusting or scabbing.’
    • ‘Nutrient concentrations in liquid storage facilities become stratified due to settling and crusting.’
    • ‘That cycle of events takes around four days, but new crops of vesicles come up in waves in the first three or four days, so you can have some vesicles growing bigger while earlier ones are drying up and crusting over.’
    • ‘It allows you to hose off the horse coated in mud, top off water buckets that are crusting with ice, and clean tack and other items without your hands turning blue.’
    • ‘Cultivating and subsurface packing after every rain prevented the soil from crusting and maintained a protective mulch that kept the moisture from evaporating.’
    • ‘The breast is stuffed with Saskatoon berry cream cheese, then crusted with crushed pecans.’
    • ‘Her hair was wild, blood crusting in long scratches down the side of her face, and the left sleeve of the biker jacket was torn almost completely free.’
    • ‘More importantly, the soil moved by the water over the seed is composed of fine soil particles that are tightly packed, increasing the potential for crusting and making emergence slower and more difficult.’
    • ‘It must be able to hold sufficient moisture, but should not crust on top as this may prevent oxygen reaching the roots.’
    • ‘Initially (catarrhal stage), patients present with a nonspecific rhinitis, which evolves into purulent, fetid rhinorrhea and crusting.’
    • ‘Balanced, at the other end, a teeny weeny pinwheel brioche, crusted with sugar.’
    • ‘On the opposite extreme, shallow-rooted groundcover weeds such as ground ivy and chickweed help prevent erosion and prevent soil crusting when dry.’
    • ‘Larger-seeded varieties could encounter more difficulty in emergence than smaller seeded varieties, particularly in cool soil conditions or after crusting.’
    • ‘This means a spot on the skin which crusts or scabs and fails to heal completely.’
    • ‘This can be especially true if a hard rain after weeding causes crusting.’
    1. 1.1with object Cover with a hard outer layer.
      ‘the burns crusted his cheek’
      • ‘Next morning the valley is crusted in frost as I find the turn-off and wind up 11 km through 135 bends, nine of them hairpins, to reach Snow Farm.’
      • ‘The manaesh, a slightly thicker bread crusted with sour crushed sumac and wild Armenian thyme, was pretty great too, especially when you toast it at home and have it with your coffee in the morning.’
      • ‘There is a tendency to use far too much oil in meat and vegetable stir-fries and indeed, there are too many foods that are heavily crusted and deep-fried.’
      • ‘The and rain and hail came with strong winds which will crust the soil, making emergence of new plants difficult in some fields.’
      • ‘Sheets of ice crusted the water, especially closer to the shore.’
      • ‘Posh chefs would crust the top with a blow torch but I don't trust myself with a blow torch when I've lost count of the wine I've drunk.’
      • ‘It had taken us longer than expected to make the trip back and we were both a total mess with a thick layer of dirt crusting our clothes and flowers stuck in our hair, which was probably every where by now.’
      • ‘The latter are four pink-centered morsels lightly crusted in flour, attended by a mix of earthy mushrooms in a translucent gold Marsala sauce.’
      • ‘The boy was battered as well, scratches and bruises showing through the pajamas he wore and blood crusting the corner of his mouth.’
      • ‘He loved it when the snow started to fall, and he loved the way the ice crusted the fallen leaves like a shower of crystals.’
      • ‘Harbor seals haul out in hidden coves, and the fog drifts through a grove of rare Monterey cypress, where lace lichen dangles from the branches and an orange algae crusts the trunks.’
      • ‘When I got tired of that I took up fire-gazing, watching the flames crusting the coals with rosy spark edgings.’
      • ‘They crusted it really well with a salty garlic mixture.’
      • ‘The blue-silver metal was cast in an ornate fashion, and white diamonds spotted with emeralds, beryls and emeralds crusted the edges of the metal.’
      • ‘Fresh fish, vegetables with their roots still crusted with dirt, red tomatoes, oranges, lemons, beans, peas, greens and salad leaves grown in the sun.’
      • ‘I stood up and after brushing away the dirt crusting my clothes followed her lead.’
      • ‘I'm a grouchy teenager afraid to get my band t-shirt crusted with flour.’


Middle English: from Old French crouste, from Latin crusta ‘rind, shell, crust’.