10th

10th is the ordinal indicator for the cardinal number ten. It denotes position in an ordered sequence and is used to specify rank or order, such as the 10th item in a list, the 10th place in a race, or the 10th chapter of a book. In dates and historical references, ordinals mark specific days, centuries, or other periods (the 10th of May; the 10th century).

In English spelling and typography, ordinals are typically formed by adding the suffix -th to the cardinal form, with exceptions for certain endings (for example, first, second, third). For ten, the standard numeral form is 10th, and the written form is tenth. The word tenth also appears in fractional expressions such as one-tenth, and in phrases like “the tenth element” in lists or arrays. The numeral and the written form are generally interchangeable in contexts that require an ordinal.

Beyond convention, 10th appears in various domain-specific usages, including literature, law, and mathematics, where it denotes the element, position, or rank number ten within an ordered set. In some cases, capitalization is used when referring to formal names or titles (as in the Tenth Amendment in the United States Constitution).

See also: ordinal numbers, ordinal indicator, tenth, one-tenth, tenth century.