Definition of buoyancy in English:



mass noun
  • 1The ability or tendency of something to float in water or other fluid.

    • ‘Weight reduction is not as important in swimming because the body mass is subject to buoyancy by being immersed in water.’
    • ‘My buoyancy is such that at 15m I could float to the surface without effort.’
    • ‘Typically, Clione swim nearly continuously to maintain a stable position in the water column and avoid sinking due to negative buoyancy.’
    • ‘If lifting the ball up stops the water from running, try to bend the float arm down to get the right buoyancy.’
    • ‘A less safe alternative would be for the supervisor to have a rapidly inflatable life jacket that would allow a rescue from under the water but would then provide adequate buoyancy to return the rescuer and the swimmer to the surface.’
    • ‘During vertical movements, animals can take advantage of gravity or positive buoyancy to permit unpowered downward or upward locomotion for a longer period.’
    • ‘This procedure confers on the armadillo enough additional buoyancy to enable it to float.’
    • ‘Built into each wheel unit was a flotation tank with sufficient buoyancy to float the unit.’
    • ‘Cold water is denser than hot water, he explains, so it provides more buoyancy.’
    • ‘Defying all laws of buoyancy, he continued walking into the water until the surface was a good five feet above him.’
    • ‘First, water provides sharks with substantial buoyancy, whereas air does not confer the same benefit to aircraft.’
    • ‘Walking underwater with a teacher's help, then floating to the surface on the ‘water elevator’ also builds trust and understanding of buoyancy in a fun way.’
    • ‘The array tube is filled with mineral oil to create neutral buoyancy, allowing the array to float behind the underwater towing vehicle.’
    • ‘The boats took on more water than they had buoyancy.’
    • ‘The Arena suit, in all honesty, has a great blend of buoyancy and feel for the water due to the specialist material.’
    • ‘They are barely in control of themselves, taking turns to float up before dumping all buoyancy and crashing back into the wreck in a cloud of silt and debris.’
    • ‘On the other hand, these wider vesicles float more readily due to their greater buoyancy.’
    • ‘My lungs then re-expand, my wetsuit buoyancy returns and I float to the surface.’
    • ‘Gas vesicles are gas-filled intracellular structures that provide buoyancy in many unicellular aquatic organisms.’
    • ‘Other colonial hydrozoans, such as the chondrophorines and siphonophorans, are pelagic; many of these have developed internal gas-filled floats as an aid to buoyancy.’
    ability to float, tendency to float, lightness
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    1. 1.1 The power of a liquid to keep something afloat.
      ‘she plunged into the sea, grateful for the buoyancy of the salt water’
      • ‘Logic tells you that you cannot fall and that the buoyancy of the water will support you, but what you feel is the opposite.’
      • ‘Even if you don't like to swim, walking in the shallow end can provide aerobic benefits, and the buoyancy of the water will take the stress off your joints.’
      • ‘Raziel, on the other hand, begins the game in the spectral realm, a plane where lost souls gather, objects can't be moved and water has no buoyancy.’
      • ‘Just letting the natural buoyancy of the water keep me afloat.’
      • ‘Water activities are very popular during pregnancy as the water offers buoyancy and allows exercise to be performed in warmer climates without raising the mother's core temperature too much.’
      • ‘Using the natural buoyancy of the water, the experimental dance is both effortless and enormously fluid.’
      • ‘And because of its buoyancy, water is also used in rehabilitation programs.’
      • ‘The buoyancy of the water protects your joints.’
      • ‘Water's buoyancy makes a swimmer feel weightless and reduces stress on joints in the spine, hips and knees.’
      • ‘Their bones are unusually thick, possibly an adaptation to make the animal heavier counteracting the buoyancy of the water.’
      lift, lifting effect
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  • 2A cheerful and optimistic attitude or disposition.

    • ‘Agile and on his toes most of the time Dr Syiem hardly looks like a person who has had a tryst with Cancer and for the time being it seems he has beaten it with his optimism resilience and buoyancy.’
    • ‘But I certainly think it took through until the 1970s possibly to regain some of that buoyancy, and some of that optimism.’
    • ‘This did not dispel Calderwood's good humour and buoyancy in a season far from finished as he embraced Levein on the touchline before kick-off.’
    • ‘Discussions became political after next to no time (and all the other Kiwis were National or centre-right) so there was a bit of hope and buoyancy that National and Dr Brash will win this year.’
    • ‘Where a month ago there was optimism and buoyancy, there is hopelessness.’
    • ‘At his Balzacian best, he radiated warmth, buoyancy, optimism and hope; but in his more Dostoyevskian mode, he was consumed by doubt, loneliness, envy and disappointment.’
    • ‘Indeed, Hem's songs - no matter how bleak - project a hope and buoyancy that would grate were it not for their deftness and skill.’
    • ‘Her music reflects youthful buoyancy and her rich repertoire keeps the audience spellbound.’
    • ‘This summer WXPN named Calico an Album of the Week, and its cheery buoyancy has earned it airplay nationwide.’
    • ‘If enthusiasm can mask a multitude of sins then Williamson will be hoping this kid's mental buoyancy will rub off on the few senior players he will still have at his disposal next term once the giant summer clearout sale is completed.’
    • ‘Bridget rides them with defiant optimism, but both her bad breaks and her endearing buoyancy in dealing with them venture outside the real.’
    • ‘Thus is Philip Gura caught in neutral buoyancy between belief and hope.’
    • ‘It lets down the charm of their formidable buoyancy and their obvious talent for sonic collage; they're at their most interesting when revelling in bombastic beats and unexpected sounds.’
    cheerfulness, cheeriness, happiness, light-heartedness, carefreeness, brightness, gladness, merriment, joy, bounce, effervescence, blitheness, sunniness, breeziness, jollity, joviality, animation, liveliness, life, sprightliness, jauntiness, ebullience, high spirits, vivacity, vitality, verve, sparkle, zest
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  • 3A high level of activity in an economy or stock market.

    ‘there is renewed buoyancy in the demand for steel’
    • ‘The Royal Institution of Chartered Surveyors said house price inflation was running at close to two-and-a-half times the long-term average, reflecting continuing buoyancy in the market.’
    • ‘At any rate, the experience of the boom-bust cycles was that rapid money-supply growth was accompanied by buoyancy in both asset prices and spending.’
    • ‘The effect of this revision has been to transform Scotland's regular flirtation with recession into a steady relationship with economic buoyancy.’
    • ‘Mr Harrison said the order book reflected the continuing buoyancy of the region's economy.’
    • ‘This reflected improved economic buoyancy, particularly in property and retail and higher spending across a range of areas from financial to general classified advertising.’
    • ‘The health of a country's economy should not be judged by the buoyancy of its stock market or its currency's strength.’
    • ‘The debate over whether kitsch constitutes a genuine art form becomes moot if the artifact in question reaches a certain critical mass of sheer buoyancy.’
    • ‘Yet the relative buoyancy of the UK economy suggests that Scotland will be insulated from these wider chills.’
    • ‘There has been a massive temporary boost to our competitiveness from a low dollar, which is the main reason for our current economic buoyancy.’
    • ‘Our British headquarters is amazed at the buoyancy of the Irish market.’
    • ‘The country in general has witnessed dramatic price rises in recent years, attributed to inflation, economic buoyancy, and now the euro changeover.’
    • ‘There is another factor behind the stock's buoyancy: a potential buyout.’
    • ‘First, the market's recent buoyancy is stirring investor greed.’
    • ‘This year experts are looking to renewed buoyancy in the US economy, while the European economies look pretty sluggish.’
    • ‘Much of the Korean economy's buoyancy can be traced to the effects of banking reforms since Korea's 1997 financial crisis.’
    • ‘The revenues for the future are showing a greater degree of buoyancy and I think we now have to focus on health, education and social welfare.’
    • ‘It is the rural sector that has given us growth and buoyancy over the last couple of years.’
    • ‘However, a surprising resilience and unexpected buoyancy has emerged during the past year.’
    • ‘After a long time, the revived projects are exceeding the value of projects shelved, showing overall buoyancy in the economy and investment.’
    • ‘None of them reported that they had relaxed their credit criteria in the face of the buoyancy in the Irish economy.’
    vigour, strength, high level of activity, burgeoning, resilience, growth, development, progress, improvement, expansion, mushrooming, snowballing, ballooning
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