Roman numeral

noun

: one of the letters that were used by the ancient Romans to represent numbers and that are still used today

Full Definition of ROMAN NUMERAL

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

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ROMAN NUMERAL Defined for Kids

noun

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

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