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 *tractat&imacron;cius, from Latin tractatus, past participle of tractare, to drag about, deal with; see treat.