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Definition of treatise

treatise

/ˈtriː.tɪs/
trea · tise
Plural:treatises
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treatise Lexical Profile

treatise Game Scores & Validity

• noun

1

A formal, systematic, and comprehensive written work that deals in depth with the principles, evidence, and conclusions of a specific subject.

Example

"The philosopher published a groundbreaking treatise on the foundations of political authority and civil liberty."

Synonyms
View all synonyms for treatise

Word Nuance & Usage

Do not confuse 'treatise' (a formal written work on a subject) with 'treaties' (the plural of 'treaty', meaning formal agreements between states), which are pronounced identically by many speakers.

• Nearby Words

treat
treatable
treater
treatise
treatment
treaty
treble

Word Origin & Etymology

Middle English, from Anglo-Norman French 'tretiz', derived from Old French 'traitier' (to treat or discuss), ultimately from Latin 'tractare' (to handle, manage, or deal with).

Cite this Entry

Wordmom. (2026). Definition of Treatise. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/treatise
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