The term "19th" typically refers to the ordinal number that comes after the 18th and before the 20th. It is often used to denote a position in a sequence, such as in dates, rankings, or lists. For example, the 19th day of a month indicates the day that follows the 18th. In historical contexts, the "19th century" refers to the period from 1801 to 1900. This era was marked by significant events such as the Industrial Revolution, which transformed economies and societies, and the rise of movements for social change, including women's suffrage and abolitionism.