Noun

(en noun)

An administrative division of an area.

* {{quote-book, year=1963, author=(Margery Allingham)

, title=(The China Governess) , chapter=Foreword citation , passage=‘I understand that the district was considered a sort of sanctuary,’ the Chief was saying. ‘An Alsatia like the ancient one behind the Strand, or the Saffron Hill before the First World War. […]’}}

the Soho district of London

An area or region marked by some distinguishing feature.

the Lake District in Cumbria

(UK) An administrative division of a county without the status of a borough.

South Oxfordshire District Council

Noun

(en noun)

A formal, usually lengthy, systematic discourse on some subject.

*

*:“[…] We are engaged in a great work, a treatise on our river fortifications, perhaps?? But since when did army officers afford the luxury of amanuenses in this simple republic??”

*2005 , (Plato), Sophist . Translation by Lesley Brown. .

*:And if someone wants to know how to make objections to actual craftsmen themselves on the subject of art in general or any particular art, there are published treatises available, as you know.

*{{quote-magazine, year=2013, month=July-August, author= Sarah Glaz

, title= Ode to Prime Numbers , volume=101, issue=4, magazine=(American Scientist) , passage=Some poems, echoing the purpose of early poetic treatises on scientific principles, attempt to elucidate the mathematical concepts that underlie prime numbers. Others play with primes’ cultural associations. Still others derive their structure from mathematical patterns involving primes.}}