Definition of buoyant in English:



  • 1Able or tending to keep afloat or rise to the top of a liquid or gas.

    • ‘He got the idea when at age 7 he saw reed boats in Peru and thought what buoyant material he might use to make his own boat in Michigan.’
    • ‘The Animal Freeing Bridge, Knowledge and Plant Garden, Stone-plate Street, deep lanes, and buoyant boats combine to offer a poetic and harmonious visitor experience.’
    • ‘Unfortunately, the foam insulation inside the suit also makes divers more buoyant and even less able to swim downward.’
    • ‘The fertilised eggs are slightly buoyant and rise towards the surface where they drift for around 12 days before hatching.’
    • ‘As they collect, the raisin becomes increasingly buoyant until it finally rises to the surface of the soda.’
    • ‘They are bulkier than steel, but as the gas they contain depletes they become buoyant, causing the base to rise behind the diver and ensuring that there is no downward drag.’
    • ‘Moreover, Bartol and company managed to visualize the flow of water around a boxfish by placing neutrally buoyant beads in the water and filming the beads as they swept past plastic models of the fish.’
    • ‘Cartilaginous skeletons are lighter than bone and help sharks to remain neutrally buoyant (able to float without sinking or rising).’
    • ‘The water making our bodies buoyant, Miguel moves a few feet to the left until we hit the wall and the edge of one of the cascading waterfalls.’
    • ‘The most buoyant body parts rise first, leaving the head and limbs to drag behind the chest and abdomen.’
    • ‘Relaxing in a fragrant soak, tired limbs, especially old limbs, become buoyant, borne in water; thus taking the load off the muscles.’
    • ‘Four other people and I have to do this project for our big group, which was to make a buoyant ship out of paper.’
    • ‘This young, thick crust is very buoyant and rises above the level of the ocean surface.’
    • ‘The models were dragged through a viscous liquid seeded with neutrally buoyant reflective particles.’
    • ‘As H2O builds up, density and viscosity decrease to a stage where the magma may again be sufficiently buoyant and mobile to rise further.’
    • ‘The liquid keeps them totally buoyant and, with no light, sound or other sensation to distract them, the body and mind soon enter a deep state of relaxation.’
    • ‘Unconventional or continuous accumulations are regional in extent, have diffuse boundaries, do not have obvious seals and traps, and are not buoyant upon a water column.’
    • ‘I'm told at my size I should be buoyant, but although I did try to swim I was terrified.’
    • ‘The only reason why they are able to stay afloat is their buoyant sacs near their throats.’
    • ‘Large-finned, negatively buoyant squid soar like eagles in rising currents, but lose control in currents above one body length per second.’
    able to float, light, floating
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    1. 1.1 (of a liquid or gas) able to keep something afloat.
      ‘buoyant water’
      • ‘The buoyant gases escaped through the silk fabric's weave.’
      • ‘Alas I spent 45 minutes circling downward in very buoyant air and landed south of Danville for 114 miles the new site record.’
      • ‘Since the demise of the hydrogen-filled Hindenburg, helium was in big demand as the buoyant gas for airships.’
      • ‘I figure if I can get a 16:1 required glide ratio to goal I can make it into Quest given the buoyant air.’
      • ‘It is hard enough to imagine the size of whales, and they live today and in the buoyant water.’
      • ‘The seawater density in the ocean normally increases with depth, because heavy water sinks and buoyant water rises.’
      • ‘The cirrus was filtering the sunlight, the air was buoyant and the thermals were as smooth as could be.’
      • ‘You can't see their chests heave, but they must, at least for a minute, after settling from a race over the rocks to soft, buoyant water.’
      • ‘The heat of the igneous body initiates convection of the water, which is heated as it is drawn into the body and carries heat away after it becomes warm and buoyant, only to be replaced by cooler water drawn in from the sides.’
      • ‘The air was buoyant and finally Mark hit some light lift and we took it back to 3,600' AGL.’
      • ‘It's a final glide to goal with final speeds at over 60 mph in buoyant smooth air.’
      • ‘No longer could he fight his way through the buoyant element of air which had been his friend since birth.’
      • ‘There was buoyant air and I got to even climb a bit from 700'.’
      • ‘She submerged herself, difficult to do with the added resistance of the buoyant air, but not impossible.’
      • ‘The tank is filled with about 10 inches of a buoyant Epsom salts water solution heated to body temperature.’
      • ‘Two Falcons launch from upper at 1300, and boat up in the very buoyant air.’
      • ‘Since it was the first day I wanted to get a brief feel for the air here, especially after all that wonderfully buoyant smooth stuff in Wisconsin, so I set the task as the 50 km triangle.’
      • ‘Clearance set in during Tuesday and slid southeastward during Wednesday, leaving the northern and northeastern parts under the influence of buoyant equatorial air.’
      • ‘We can even float, sustained by the water's buoyant push.’
  • 2Cheerful and optimistic.

    ‘the conference ended with the party in a buoyant mood’
    • ‘Further cause for optimism: the buoyant mood of attendees at a home-builder convention Brozak recently attended.’
    • ‘Suddenly the mood is buoyant again but this will be a major test.’
    • ‘Paul was vital, and sparkling, and buoyant, and cheerful, hopeful, courageous.’
    • ‘There is a buoyant mood amongst the protestors at Bellanaboy.’
    • ‘Senior figures in the film industry last night gave qualified backing to McKidd's view, agreeing that an overly buoyant mood may have led to bad decisions.’
    • ‘Consider just a few indications of the island's buoyant mood.’
    • ‘He had a care-free manner, always in buoyant mood, and was good company at any time.’
    • ‘Yorkshire were in buoyant mood today for their Benson and Hedges Cup match against Derbyshire at Headingley which marked the opening of their home season.’
    • ‘Liberal Democrats were in buoyant mood this week, leaner, hungrier and more convinced than ever that their party's long history of false dawns could soon be over.’
    • ‘The buoyant mood of his audience was certainly out of kilter with the deep undercurrent of frustration evident elsewhere in Bournemouth this week.’
    • ‘And judging by the buoyant mood of the cheerful crowds swirling all over the city centre, and day after day of packed events, they were succeeding.’
    • ‘It was raining heavily but the mood was buoyant and positive.’
    • ‘She smiled brightly, her own buoyant optimism coming to the surface again.’
    • ‘The air of despair that pervaded the Greenyards last season has been supplanted by a buoyant optimism borne out of two successive wins by Melrose in the opening rounds of the BT Premiership.’
    • ‘The meeting of Abbeyside and Shamrocks is equally difficult to call, although Shamrocks will go into the game in buoyant mood following their impressive victory over Dungarvan last time out.’
    • ‘He also saved his detailed, melancholic diary - which did not turn up for more than a century, and which provides such a valuable anchor to Frémont's buoyant optimism.’
    • ‘I returned from Southern California Tuesday evening in a buoyant mood, sated in the senses after two weeks amongst three small grandboys and one teenaged granddaughter.’
    • ‘The Democrats' mood in Cincinnati was buoyant as the polling stations closed at 7.30 pm.’
    • ‘He was in a buoyant mood; he had just been told that two insurgents had been blown up and killed while trying to set a roadside bomb.’
    • ‘However, he had been in a buoyant mood prior to his death.’
    cheerful, cheery, happy, light-hearted, carefree, bright, glad, merry, joyful, bubbly, bouncy, effervescent, blithe, sunny, breezy, jolly, jovial, animated, lively, sprightly, jaunty, ebullient, high-spirited, vivacious, vital, sparkling, sparky, zestful, perky
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  • 3(of an economy, business, or market) involving or engaged in much successful trade or activity.

    ‘car sales were buoyant’
    • ‘The aim is to make the process as smooth as possible and help increase the succession rate for buoyant businesses.’
    • ‘Some companies are prepared to reduce their prices drastically to keep sales buoyant, offering cash back, stamp duty paid, paying for legal fees and even kitchen appliances such as fridge freezers and washing machines.’
    • ‘He points out that even in last year's buoyant market 5000 repossession actions were lodged in Scottish courts, and he is very fearful of what might happen if prices crash.’
    • ‘The first is the desire of the US government to keep interest rates low and the dollar strong since inward investment keeps the stock market buoyant and finances the trade deficit.’
    • ‘The group said that despite higher volumes, the Republic of Ireland's trading profits were broadly flat in a pretty buoyant market.’
    • ‘The survey, carried out by national estate agents Strutt and Parker, shows the property market in the county remains buoyant and prices are still rising.’
    • ‘The central bank warned earlier this year that a sudden end to the country's property boom posed one of the most serious risks to the country's buoyant economy and jobs market.’
    • ‘However, there is wide consensus in the belief that the quest for sustainable growth in African economies is dependent on a viable productive base and buoyant business sector on the continent.’
    • ‘The talked-about flotation of the Irish business in a buoyant market remains one possibility for 2001.’
    • ‘The market is very buoyant; all this activity appears to suggest that it is a good time to sell and a good time to buy.’
    • ‘The result: a buoyant business market for PCs, even as corporates and consumers buy into non-PC platforms.’
    • ‘Housing markets are buoyant in the US, Britain, and some euro economies, so there's no problem there - there are no constraints on monetary easing.’
    • ‘The last number of years has seen significant cost inflation, and in a rising and buoyant economy, businesses were able to pass on such cost increases to customers.’
    • ‘Service sector activity was much more buoyant than manufacturing, with the headline activity index rising to 57.6 from 57.0 in the previous month.’
    • ‘This has had an almost immediate impact on consumer confidence and in expectations of buoyant Christmas sales.’
    • ‘Fuelling these buoyant figures is the fact that domestic sales of pick-ups rose by almost one third so far this year over the same period last year.’
    • ‘Director Keith Hollinrake said that while the market had quietened down after last year's dramatic price rises, it was still buoyant, with demand increasing slightly again in the last three months.’
    • ‘The American economy is amazingly buoyant, amazingly strong.’
    • ‘The property market in Budapest was extremely buoyant and house prices rose dramatically in the immediate aftermath of the transition to multi-party democracy in 1989.’
    • ‘As buoyant and liquid as the U.S. equity markets are, however, there is plenty of room for improvement.’
    booming, strong, vigorous, burgeoning, thriving, growing, developing, progressing, improving, expanding, mushrooming, snowballing, ballooning
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Late 16th century: from French bouyant or Spanish boyante, present participle of boyar ‘to float’ (see buoy).