ex delicto /ɛks dəˈlɪktoʊ/adjective 1adverb 1 adjective[after a noun]1 •Of a legal obligation: arising from a delict or tort, or some other wrongful act. adverb[after a noun]1 •From a delict or tort, or some other wrongful act.What the Romans said is that, whereas some obligations arose ‘ex delicto’ (that is, from a delict or wrong), others arose ‘quasi ex delicto’ (and likewise for contract). — 2009