From Longman Dictionary of Contemporary Englishironcladi‧ron‧clad /ˈaɪənˌklæd $ -ərn-/ adjective 1 an ironclad agreement, proof, defence etc is so strong and sure that it cannot be changed or argued against an ironclad guarantee2 old-fashioned covered with iron an ironclad battleship
Examples from the Corpus
ironclad• Suffice it to say the case against him was not exactly ironclad and that he was not represented by the Dream Team.• She said she made sure she had an ironclad prenuptial agreement.• It dramatized the superiority of ironclad warships over wooden ones. 