# xix

CEFR C2 · Noun

Source: https://englishreference.com/word/xix
Updated: 2026-05-19

## Definition

the nineteenth number. You use it when you are writing numbers in Roman numerals, like for a chapter in a book.

For teachers: the Roman numeral representing the number nineteen.

## Examples

- The chapter is labeled as Chapter XIX.
- The library catalog lists the book as being from the nineteenth century, though the Roman numeral on the spine reads XIX.
- In the final act of the play, the protagonist is introduced as the nineteenth son of a noble family, a detail noted in the margin as XIX.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.