Learn How to Pronounce fifteenth
(Listen to the audio above for the stress and intonation)
The Expert's Take

Meaning and Context
The term fifteenth is an ordinal number that fundamentally denotes the position in a sequence immediately following the fourteenth, formally written as 15th. Beyond its basic numerical function, the fifteenth holds significant meaning across diverse fields, enriching its contextual usage. In mathematics, it can represent the fraction 1/15, or one of fifteen equal parts. In music theory, a fifteenth is a compound interval spanning two octaves, a sound prominently featured in organ music where stops labeled "Fifteenth" sound two octaves above the principal pitch. Historically, the term is cemented in English fiscal history through the Fifteenth and Tenth, a major form of parliamentary tax assessment levied from 1334 until the 17th century, where a "fifteenth" represented a fixed levy on movable property in rural areas. This multifaceted term also appears in cultural milestones, such as the celebration of a quinceañera on a girl's fifteenth birthday in Latin American traditions, and in governance, as with the Fifteenth Amendment to the U.S. Constitution, ratified in 1870, which prohibited the denial of voting rights based on race.
Common Mistakes and Alternative Spellings
The standard spelling is "fifteenth," which follows the common pattern for ordinal numbers by adding "-th" to the cardinal number "fifteen." A frequent and understandable typo is "fiftheenth," resulting from an intrusive "e," mirroring the spelling of "fourteenth." Other common misspellings include "fifteeth" (dropping the 'n') and "fiftenth" (dropping the second 'e'). When writing the numeral form, "15th" is universally accepted, though care should be taken not to mistakenly write "15rd" or "15nd," which are grammatically incorrect for this ordinal. In historical financial contexts, it is often capitalized as "the Fifteenth" when referring specifically to the medieval tax. The musical interval is typically written in lowercase, as in "a passage played in fifteenths."
Example Sentences
The composer instructed the organist to engage the Fifteenth stop to achieve the brilliant, piercing tone two octaves above the foundational note.
Historians note that the levy known as the Fifteenth and Tenth was a cornerstone of royal revenue in late medieval England, though its yield became less significant over time.
Her quinceañera, a lavish celebration of her fifteenth birthday, was a deeply meaningful family event.
The tournament's fifteenth round proved to be the most grueling, testing the endurance of even the top-seeded athletes.
When dividing the estate, he was bequeathed a fifteenth share, which amounted to a modest but meaningful portion of the total assets.
The ratification of the Fifteenth Amendment in 1870 was a landmark, if later undermined, achievement of Reconstruction.
Sources and References
As a standard English ordinal, I used the Oxford English Dictionary (OED) and Wiktionary for phonetic transcriptions, supplemented by Forvo and YouGlish to hear various native accents.
- https://en.wiktionary.org/wiki/fifteenth
- https://en.wikipedia.org/wiki/Fifteenth
- https://forvo.com/word/fifteenth/
- https://youglish.com/pronounce/fifteenth/english
- https://www.oed.com/dictionary/fifteenth_adj
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