The definition of a treatise is a formal, written article or book that deals with the facts, evidence and conclusions on a specific subject.
An example of a treatise is a formal written analysis of the causes of a war.
- a formal, systematic article or book on some subject, esp. one in which the conclusions are based on a detailed consideration of factual evidence or governing principles
- Obs. a narrative; tale
Origin of treatiseMiddle English tretis from Anglo-French tretiz from Old French an unverified form treiteiz from traiter: see treat
A systematic, usually extensive written discourse on a subject.
Origin of treatiseMiddle English treatis from Anglo-Norman tretiz alteration of treteiz from Vulgar Latin tractātīcius from Latin tractātus past participle of tractāre to drag about, deal with ; see treat .