treatise
Treatise (noun) means a long, formal written work that thoroughly examines a single subject. Example: “He wrote a treatise on the philosophy of law.”
How to use treatise
Learner’s notesIn plain EnglishA treatise is a serious, detailed piece of writing devoted to one topic.
Word forms
- Plural
- treatises
Fill the gap
Can you complete this real example?
He wrote a _____ on the philosophy of law.
Etymology
From Old French traitis, "treatise, account" — related to "treat" and "treaty."