Definition of Roman numeral
: a numeral in a system of notation that is based on the ancient Roman system — see number table
Examples of roman numeral in a sentence
In Roman numerals “X” is equal to the number 10.
First Known Use of roman numeral
ROMAN NUMERAL Defined for English Language Learners
Definition of Roman numeral for English Language Learners
: one of the letters that were used by the ancient Romans to represent numbers and that are still used today
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