# xiii

CEFR B2 · Numeral

Source: https://englishreference.com/word/xiii
Updated: 2026-05-06

## Definition

the number thirteen written in Roman numerals. You see this in history books, on old clocks, or in the names of kings.

For teachers: the cardinal number thirteen expressed in Roman notation. Often used in historical contexts, such as the names of monarchs or centuries.

## Examples

- The chapter ends on page xiii of the introduction.
- King Louis XIII of France ruled during the early seventeenth century.
- The document was dated with the Roman numeral XIII to signify the thirteenth day of the month, a common practice in formal historical records.

## Usage notes

- Typically used as a label or ordinal marker rather than for mathematical calculations.

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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.