19th

The 19th, written as 19th in numerals, is the ordinal indicator for the number nineteen. It is used to denote position in a sequence and to describe order in dates, lists, or ranks. The corresponding cardinal form is nineteen, and the ordinal form can also be written out as nineteenth.

Spelling and formation: in English, the ordinal suffix -th is added to the word nineteen to produce nineteenth, and the standard written abbreviation is 19th. The Roman numeral for nineteen is XIX.

In historical contexts, the term 19th is commonly associated with the 19th century, typically defined as the years 1801 through 1900 in standard scholarly usage, though casual reference sometimes spans 1800–1899. The 19th century saw industrialization, political reform movements, and cultural change across many regions.

Other uses include calendar or geographic designations such as the 19th street or the 19th floor, as well as ordinal rankings like 19th place. The term also appears in titles and descriptions, such as the 19th Amendment to the U.S. Constitution, ratified in 1920, which secured women’s suffrage.