▪ neglect of one's duty: "he relayed this in such a manner as to imply grave delinquency on the host's part"Similarnegligencedereliction of dutyremissnessneglectfulnessirresponsibility
▪ a failure to pay an outstanding debt.
Word Originmid 17th century: from ecclesiastical Latin delinquentia, from Latin delinquent- ‘offending’ (see delinquent).