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

More powerful than an argument or a treatise, The Last Interview is an immersive experience. —Sheri Linden, HollywoodReporter, 15 May 2026

In 1661, John Evelyne’s treatise Fumifugium outlined negative health effects of breathing coal smoke. —Annie Persons, The Conversation, 7 May 2026

The treatise reflects a time when Dara was translating Hindu texts and exploring their connections with Islamic mystical ideas. —Encyclopedia Britannica, 9 Apr. 2026

Skyhorse has since published a dozen or so books by Kennedy, including a memoir and several more anti-vaccine treatises. —Tom Bartlett, The Atlantic, 5 Apr. 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