fifteenth

American  

[fif-teenth] / ˈfɪfˈtinθ /

adjective

1. next after the fourteenth; being the ordinal number for 15.

2. being one of 15 equal parts.

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noun

• fifteenths
  plural

1. a fifteenth part, especially of one (1/15).

2. the fifteenth member of a series.

3. Music. the interval of two octaves.

fifteenth British  

/ ˈfɪfˈtiːnθ /

adjective

1. 1. coming after the fourteenth in order, position, time, etc. Often written: 15th

   2. ( as noun )

      the fifteenth of the month

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noun

1. 1. one of 15 equal or nearly equal parts of something

   2. ( as modifier )

      a fifteenth part

2. the fraction equal to one divided by 15 ( 1/ 15 )

3. 1. an interval of two octaves

   2. one of two notes constituting such an interval in relation to the other, esp the one higher in pitch

   3. an organ stop of diapason quality sounding a note two octaves higher than that normally produced by the key depressed; a two-foot stop

Other Word Forms

Noun Inflected Forms

• fifteenths
  plural

Etymology

Origin of fifteenth

before 900; Middle English fiftenthe ( see fifteen, -th ²); replacing Middle English fiftethe, Old English fīftēotha

Example Sentences

See Examples For:

fifteenth fifteenths

The farmer, who is calling for tougher penalties for livestock worrying, said this the the fourteenth or fifteenth such attack at his farm.

From BBC ● Jan. 29, 2026

By the late fifteenth century, however, the lines originally drawn in biblical maps began spreading into maps of the wider world.

From Science Daily ● Nov. 30, 2025

In 1965, Congress passed the Voting Rights Act — the subtitle of which, Keyssar points out, is “an act to enforce the fifteenth amendment.”

From Salon ● Nov. 25, 2025

On the fifteenth floor sits Per Sundin, chief executive of Pophouse Entertainment which runs the museum.

From BBC ● Mar. 14, 2024

First he had written Miss Lavinia—Johnny knew he was dancing attendance on her—a rude note bluntly declining her invitation to a frolic which on the fifteenth of December would follow a military concert.

From "Johnny Tremain" by Esther Hoskins Forbes

A supply of one subsidy and two fifteenths was granted by parliament.

From The History of England in Three Volumes, Vol.I., Part D. From Elizabeth to James I. by David Hume

She received from the parliament, during the course of her whole reign, only twenty subsidies and thirty-nine fifteenths.

From The History of England in Three Volumes, Vol.I., Part D. From Elizabeth to James I. by David Hume

At times of crisis such as the arrival of the Armada the votes were enlarged by granting more tenths and fifteenths and subsidies.

From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 4 "England" to "English Finance" by Various

Subsidies and fifteenths are frequently mentioned by historians; but neither the amount of these taxes, nor the method of levying them, have been well explained.

From The History of England in Three Volumes, Vol.I., Part D. From Elizabeth to James I. by David Hume

But it is a problem which need not in the least delay the advent of independence for the other fourteen fifteenths of the inhabitants of the archipelago—all Christians living on islands north of Mindanao.

From The Philippines: Past and Present (Volume 1 of 2) by Dean C. Worcester