nineteenth

American  

[nahyn-teenth] / ˈnaɪnˈtinθ /

adjective

1. next after the eighteenth; being the ordinal number for 19.

2. being one of 19 equal parts.

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noun

1. a nineteenth part, especially of one (1/19).

2. the nineteenth member of a series.

nineteenth British  

/ ˌnaɪnˈtiːnθ /

adjective

1. (usually prenominal)

   1. coming after the eighteenth in numbering or counting order, position, time, etc, being the ordinal number of nineteen. Often written: 19th

   2. ( as noun )

      the nineteenth was rainy

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noun

1. 1. one of 19 approximately equal parts of something

   2. ( as modifier )

      a nineteenth part

2. the fraction that is equal to one divided by 19 ( 1/ 19 )

Etymology

Origin of nineteenth

before 900; Middle English nyntenthe ( see nineteen, -th ²); replacing nientethe, Old English nigonteotha; see nine, tithe

Example Sentences

“No one considered gradations of mental illness in the nineteenth century,” she writes.

From The Wall Street Journal • May 11, 2026

Its history as a distinct region of Somalia dates back to nineteenth century colonial rule.

From BBC • Dec. 29, 2025

When Britain’s global turn came in the nineteenth century, its naval dominion over the world’s oceans was softened by an enticing cultural ethos of commerce, language, literature, and even sports.

From Salon • May 28, 2025

Caged birds were used as living carbon monoxide detectors starting in the late nineteenth century — thanks to their highly efficient respiratory systems, the birds died from gas leaks long before human miners did.

From Los Angeles Times • Mar. 7, 2025

The Albemarle had been built in the nineteenth century, as a retreat for rich convalescents.

From "The Secret History" by Donna Tartt