nolle prosequiPronunciation: /ˌnɒlɪ ˈprɒsɪkwʌɪ/Definition of nolle prosequi noun Law a formal notice of abandonment by a plaintiff or prosecutor of all or part of a suit. (in the UK) the dismissal or termination of legal proceedings by the Attorney General. Origin:Latin, literally 'refuse to pursue'nolle prosequi in other Oxford dictionaries Definition of nolle prosequi in the US English dictionary