Definition of watertight in English:



  • 1Closely sealed, fastened, or fitted so that no water enters or passes through.

    ‘a watertight compartment’
    • ‘If left to deteriorate to the point that the lock was not watertight, there would be a serious effect on flood control as it would be impossible to maintain the river level in the Foss.’
    • ‘I quickly ran down the escape pod, and I locked the watertight hatch behind me.’
    • ‘The wealthier residents are having their houses made thoroughly watertight and are said to be looking forward to seeing some interesting life forms swim by their windows in the near future.’
    • ‘The watertight seals over structural joints tend to deteriorate over time as the caulking becomes less sticky and dislodges.’
    • ‘Seals and seams are known to be less than watertight, and many divers make do with damp suits rather than drysuits.’
    • ‘But how will I live without something watertight underfoot, you ask?’
    • ‘With little effort, you can bend and solder lead and solder the joints between flashings for a long lasting, watertight seal.’
    • ‘These little guys would be hand-raised by the Penguin Reserve and subsequent surgeries performed to remove scar tissue until the area was healed and watertight.’
    • ‘He said: ‘On top of that, the city council needs to spend close to £200,000 just to make the building watertight.’’
    • ‘This lid is provided with a tool to make removing and reinstalling the lid on the waterblock base simple, while maintaining the watertight seal.’
    • ‘In this situation the compartment would have been evacuated and sealed using the watertight bulkhead door to the rear of the torpedo stowage.’
    • ‘The watertight rooms, costing from £500 a night up to £3,000 for a suite, are aimed at wealthy travellers who want a unique holiday experience.’
    • ‘The experimental tank was constructed from glass of 1 cm thickness held together with silicone rubber and divided into two equal proportions by a watertight partition.’
    • ‘In any event it was designed only to be weathertight not watertight.’
    • ‘However, the seal proved to be less than watertight.’
    • ‘The heat is oppressive, and you realize it the moment you step through the watertight door onto the weather deck of any ship in the gulf.’
    • ‘But even watertight concrete is not impermeable to the passage of moisture.’
    • ‘Because of the freeze-and-thaw cycle, concrete dikes tend to require annual maintenance to seal cracks and remain watertight.’
    • ‘We spent £250,000 on it last year and are looking to move on to the next stage, to make the building watertight.’
    • ‘When the sections compress the rubber, this should form a watertight seal.’
    waterproof, water-repellent, water-resistant, weatherproof
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  • 2(of an argument or account) unable to be disputed or questioned.

    ‘their alibis are watertight’
    • ‘But if you are going to claim that Mexican immigrants don't want to be Americans, your argument had better be watertight.’
    • ‘Merton's arguments are often hypothetical, but the logic is always watertight on closer scrutiny.’
    • ‘In their attempt at being watertight and perfect, our laws are so wordy that they lose their spirit amongst the letters.’
    • ‘How watertight do you need these to be, factually?’
    • ‘No justification is good enough - or none short of a watertight deductive argument, and all but the sceptics will agree that this is too much to demand.’
    • ‘Why, he asks, cannot the protagonists accept that their opponents' arguments, even if not entirely watertight, may nevertheless be partly correct?’
    • ‘That argument is not watertight, however, because existing law does not formally allow euthanasia, for a variety of reasons mentioned briefly above.’
    • ‘The question is how, considering that both boys have watertight alibis.’
    • ‘I will lay it on the line - there is not one such fossil for which one could make a watertight argument.’
    • ‘A fully informed, carefully and methodically reasoned, conceptually watertight political argument lies well outside them.’
    • ‘Phillip's argument isn't exactly the most watertight.’
    • ‘At least I've finally found a watertight argument against Alec ever moving me to the countryside.’
    • ‘I've no doubt there all kinds of holes in this logic, and many examples that could suggest these arguments are less than watertight.’
    • ‘They are having to ensure that their evidence is more watertight than that which would be expected in a court of law.’
    • ‘He went on to state that all aspects of anti-social behaviour have to be examined and a case would have to be watertight before the local authority went to court seeking to evict a tenant.’
    • ‘In other instances, some of these learned men and women, devoid of principles, have thought nothing of taking up watertight and indefensible cases just for the money.’
    • ‘Humbugging cynics might wonder if this seasonal tide of volunteers is entirely altruistic or a conveniently watertight excuse for avoiding dysfunctional familial festivities.’
    • ‘Fireworks should not be sold to anyone who thinks that loud explosions are actually worth paying money for but I can see that it would be difficult to frame that in a watertight legal manner.’
    • ‘While mobile phone records can be scoured from here to eternity, anything short of recorded conversations seems unlikely to constitute watertight evidence.’
    • ‘But remember, this is entertainment not the Special Theory of Relativity - it doesn't have to be mathematically watertight.’
    indisputable, unquestionable, incontrovertible, undeniable, irrefutable, unassailable, impregnable, beyond dispute, beyond question, beyond doubt, indubitable
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