# xviii

CEFR C2 · Noun

Source: https://englishreference.com/word/xviii
Updated: 2026-05-18

## Definition

the number eighteen written in Roman numerals. You use this when you want to write a date or a chapter number in an old style.

For teachers: the Roman numeral representing the cardinal number eighteen.

## Examples

- The historian noted that the treaty was signed on the eighteenth day of the month, written as XVIII.
- While modern digital clocks use Arabic numerals, many formal invitations still feature the date written in Roman numerals, such as the eighteenth of May as XVIII.

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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.