Definition of ironclad in US English:



  • 1Covered or protected with iron.

    armour-plated, steel-plated, mailed
    View synonyms
    1. 1.1 Impossible to contradict, weaken, or change.
      ‘an ironclad guarantee’
      • ‘The script's biggest flaw, however, is in breaking an ironclad convention of the genre and contradicting what's known about actual serial killers.’
      • ‘Secondly, we need ironclad guarantees from our governments that no future negotiations would prevent governments from providing good public services to their citizens.’
      • ‘The United States is seeking an ironclad guarantee that no US national will ever be investigated or prosecuted by the International Criminal Court.’
      • ‘Most of that ire comes from the company's ironclad, until-death-do-you-part contracts that the company previously insisted members buy.’
      • ‘But in fact what the U.S. really wants is an ironclad 100 percent guarantee that no American will ever be brought before that international body.’
      • ‘He hoped that with the ironclad guarantees incorporated in the Constitution, the Services would resolutely stand by the Constitution and the law even under the most trying circumstances.’
      • ‘It's an explicit, rock solid, ironclad guarantee.’
      • ‘But one thing is clear: Unless the integrity and unity of the new security force can be guaranteed - ironclad guaranteed - then the Coalition is taking an enormous risk.’
      • ‘To authorize private accounts is nothing but a windfall for financial institutions, and it will remove the safety net and an ironclad government guarantee for 80% plus of the population.’
      • ‘Romaine says companies need to make skills transfer, such as classroom and on-site training, an ironclad part of any contract, essentially making it one of the project's deliverables.’
      • ‘Users of finished-steel products complain of severe supply constraints and of enforced price increases amid contracts that are not as ironclad as they thought.’
      • ‘This is an all but ironclad guarantee that the prices of such drugs will increase and increase sharply.’
      • ‘Yours to command, indefinitely with an ironclad contract.’
      • ‘If the military really can't fight wars without contractors, it must at least come up with ironclad policies on what to do if the private soldiers break local laws or leave American forces in the lurch.’
      • ‘The confidentiality clauses on reality television contracts are also ironclad.’
      • ‘It was not sufficient to make an ironclad statistical argument.’
      • ‘Say you have a company that signs an ironclad contract to build a building for $8 million dollars.’
      • ‘Despite an apparently ironclad guarantee of safe conduct, he was arrested, imprisoned and burnt at the stake on July 6, 1415.’
      • ‘Today owners and sponsors pay lawyers a lot of money to negotiate ironclad contracts with their drivers, and many teams now take a ‘grow-your-own’ approach to finding new talent.’
      • ‘It's a fight they probably would lose, but it's time for a team to take a stand and challenge the ironclad nature of contract guarantees.’


  • A 19th-century warship with armor plating.

    • ‘Even Warrior, Britain's first screw-driven ironclad, retained sail-power after modifications in 1887.’
    • ‘The Union Monitors cannot enter the state's shallow coastal inlets, and the Rebels are building a powerful ironclad to sweep the US Navy's wooden ships from the North Carolina coast.’
    • ‘Bulloch, too, was initially unsuccessful in purchasing any ironclads in England; however, in February 1862, Mallory's hopes for obtaining European-built ironclads rose.’
    • ‘As his vignette indicated, the initial stages of action saw the Russians landing damaging blows on the Japanese ironclads.’
    • ‘The £13 million ship, which has been named Research Vessel Triton, is said to represent the most radical step forward in warship design since the introduction of the ironclads.’