Roman numeral

noun

Definition of Roman numeral

: a numeral in a system of notation that is based on the ancient Roman system — see Table of Numbers

Examples of Roman numeral in a Sentence

In Roman numerals “X” is equal to the number 10.

First Known Use of Roman numeral

circa 1638, in the meaning defined above

Learn More About Roman numeral

Time Traveler for Roman numeral

Time Traveler

The first known use of Roman numeral was circa 1638

See more words from the same year

Dictionary Entries Near Roman numeral

Roman nose

Roman numeral

Romano

See More Nearby Entries 

Statistics for Roman numeral

Cite this Entry

“Roman numeral.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Roman%20numeral. Accessed 28 Jun. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More Definitions for Roman numeral

Roman numeral

noun

Kids Definition of Roman numeral

: a numeral in a system of figures based on the ancient Roman system In Roman numerals X equals 10.

More from Merriam-Webster on Roman numeral

Nglish: Translation of Roman numeral for Spanish Speakers

WORD OF THE DAY

Test Your Vocabulary

Words Named After People

  • name tags
  • Namesake of the leotard, Jules Léotard had what profession?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!