perjuratio Save DMLBS perjuratio [ML], pejeratio [LL] , (act of) false swearing, breach of oath, perjury. perjuro ‥ unde ‥ ~o Osb. Glouc. Deriv. 282; contra Petri cathedram ‥ publica per regnum pejeratio Gir. EH II 31 p. 375.