# xxiii

CEFR C2 · Noun

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

## Definition

the number twenty-three written in Roman numerals. You use this system to write numbers using letters like I, V, X, and L.

For teachers: the Roman numeral representing the cardinal number twenty-three. Used primarily in historical contexts, formal titles, or specific numbering systems.

## Examples

- The chapter is labeled as Chapter XXIII.
- The date on the old manuscript is written as XXIII April MDCCCLXXVII.
- While modern digital systems use Arabic numerals, many legal documents and historical texts still employ Roman numerals like XXIII to denote specific sections or centuries.

---

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.