Duhaime's Law Dictionary Quaestor Definition: In ancient Roman law, senior legal advisor. Akin to modern day minister of justice, attorney general or solicitor general. In ancient Rome, the position of quaestor was that of most senior legal advisor to the government of the time, be it emperor or other.Of the duties of the quaestor, the most important was the development of new laws.Tribonian was quaestor reporting to the Emperor Justinian.In the era of Justinian, a specialized office developed, legal advisor to the person of the emperor, as in king's counsel or queen's counsel of early English law. That was the quaestor of the sacred place.REFERENCES: Duhaime, Lloyd, Duhaime's Legal Dictionary Duhaime, Lloyd, Duhaime's Legal Citations & Abbreviations Honore, Tony, Tribonian (London: Duckworth, 1978) Categories & Topics: Dictionary of Latin Law Terms Always looking up definitions? Save time with our search provider (modern browsers only) If you find an error or omission in Duhaime's Law Dictionary, or if you have suggestion for a legal term, we'd love to hear from you!