treatise

noun

trea·​tise ˈtrē-təs 

also -təz

1

: a systematic exposition or argument in writing including a methodical discussion of the facts and principles involved and conclusions reached

a treatise on higher education

2

obsolete : account, tale

Examples of treatise in a Sentence

Recent Examples on the Web

The manuscript, a treatise of Epicurean philosophy also likely written by Philodemus, was entirely unknown to scholars before the Challenge. — Claire Cameron, Scientific American, 26 June 2026

Well, that’s my entire treatise on my chronic disease. — Marla Jo Fisher, Oc Register, 10 June 2026

In the beginning, there was bread The book’s centerpiece chapters on starters, mains and sweets are bookended on one side by a treatise on how to make and store breadcrumbs of various sizes, with an under-duress sub-section about how to buy breadcrumbs. — Scott Hocker, TheWeek, 8 June 2026

Lyubomirsky, a longtime researcher in the field of happiness, together with Harry Reis, a dean’s professor in the University of Rochester’s department of psychology, have written a treatise on how to bring more compassion, acceptance and vulnerability to our relationships. — Todd Martens, Los Angeles Times, 1 June 2026

Word History

Etymology

Middle English tretis, from Anglo-French tretiz, alteration of tretez, traitet, from Medieval Latin tractatus, from Latin tractare to treat, handle

First Known Use

14th century, in the meaning defined at sense 1

Rhymes for treatise

• fetus
• foetus
• meatus
• thetis
• caritas
• mellitus
• cellulitis
• margaritas
• tonsillitis

Kids Definition

treatise

noun

trea·​tise ˈtrēt-əs 

: a book or article examining a subject carefully and completely