5th

5th is an ordinal indicator used to denote the fifth position in a sequence or ranking. It is formed from the number five followed by the common English suffix th, though written as 5th in numerical form and spelled as fifth in word form. The suffix rules generally apply to ordinals for most numbers, with special spellings for some early numbers (e.g., first, second, third) but not for 5th.

In date notation and everyday language, 5th commonly appears to indicate a specific day in a month or year, such as the 5th of July or the 5th of 1776. It is also used in contexts like “the 5th century” or “the 5th arrondissement,” where it marks order or position within a larger time span or geographic division.

In mathematics, the 5th position can refer to the fifth term in a sequence or the fifth element in a set. In astronomy, the 5th planet from the Sun is Jupiter. In music, a perfect fifth is an interval spanning seven semitones and is a fundamental element in harmony and tonal music.

The phrase the Fifth Amendment of the United States Constitution governs legal concerns around self-incrimination and due process. In colloquial usage, “pleading the Fifth” refers to invoking this constitutional right.

A traditional unit of liquid volume, a fifth, refers to one-fifth of a US gallon. While the exact metric equivalent varies slightly by system, it is commonly associated with bottles of liquor and has historical usage in the United States, though modern bottling commonly uses metric measurements like 750 milliliters.