i·ron·clad /ˈaɪənˌklæd $ -ərn-/ adjectiveadj 1 an ironclad agreement, proof, defence etc is so strong and sure that it cannot be changed or argued against 〔协议、证据、辩词等〕不能改变的，无法反对的，铁定的 an ironclad guarantee 绝对的保证
2 old-fashioned covered with iron 装甲的 an ironclad battleship 装甲战列舰
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.