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 ( nineteen, -th ² ); replacing nientethe, Old English nigonteotha; nine, tithe

Example Sentences

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

From BBC • Dec. 29, 2025

At the peak, in the late nineteenth and early twentieth centuries, probably one out of every three Americans moved each year.

From Salon • Mar. 26, 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

There are also historic examples of space weather interfering with railway signalling as far back as the nineteenth century.

From Science Daily • Dec. 11, 2023

Just as Allan Pinkerton, in the nineteenth century, was known as “the eye,” Burns, in the twentieth century, had become “the ear.”

From "Killers of the Flower Moon" by David Grann