watertight 2adjectivedomain: all adjPrinceton WordNet [ver.3.1]EnglishDefinitionwithout flaws or loopholesReport errorPath to highest hypernymMorphologySynset graphExamples1.an ironclad contract2.a watertight alibi3.a bulletproof argumentSynonymsunassailable 3unshakable 2bulletproof 1