countersueとは意味:{他動-1} : ~に対して訴訟{そしょう}を起こす -------------------------------------------------------------------------------- {他動-2} : (被告{ひこく}が)反訴{はんそ}を提起{ていき}する、逆に訴える、逆提訴{ぎゃく ていそ}する、逆告訴{ぎゃく こくそ}する countersue meaning: transitive verb and intransitive verb To sue a person by whom one is being sued